Beli Beche L 10 bekas (80.979)

Tahun pembuatan: 2025, Kondisi: baru, Vertical packaging machine including dosing unit(s) with 10 production lines for manufacturing "stick-packs" with a center back seal (alternatively: 3- or 4-side sealing available at extra cost) for packaging granulates (sugar, salt, etc.). Features PLC and color touchscreen from OMRON, self-diagnosis. Pneumatic components by AIRTAC, temperature PID by OMRON, electronic components by SCHNEIDER and OMRON. Film feed, AB inverter control, stainless steel construction (SS304), vibratory cup dosing unit for granulates. - Specifications: max. machine cycle rate in idle mode: 10x60 cycles/minute; accuracy: +/-10%; suitable for all BOPP/PE and laminated films; bag sizes: L(50-350)xW(10-38)mm; power supply: 220V, 6.5kW; compressed air: 1.5m³/min, 6 bar; machine dimensions: L1800xW1500xH1900mm; weight: 750kg. This machine/system is also available in further versions for various packaging sizes and packaging speeds. Iisdpsv Nmdpofx Ahyjh Please note that our new equipment prices are often lower than typical used equipment prices. Feel free to inquire and let us know your packaging requirements. - We usually have 30-50 different new machines available from stock for immediate delivery. Additionally, for custom-built machines, we offer very short lead times starting from approx. 3 weeks. - All machines come with full warranty.

Kondisi: baru, Tahun pembuatan: 2025, Complete dosing and packaging system for liquids, including 150-liter tank with agitator and twin-piston pump. AMTEC P60L VERTIwrap machine with vacuum film draw-down belts, MITSUBISHI control, and WEINVIEW touchscreen. PE film sealing unit (recommended film: PE Co-extruded, 3-layer LLDPE). - Specifications: Bag size: L(100-300)xW(80-240)mm; max. filling volume: 1.5 liters; max. machine cycle rate (idle): 40 cycles/minute; tank: with agitator, 150 liters, SS304 stainless steel; twin-piston pump: stainless steel tube SS304, outlet diameter: 167mm, inlet diameter: 158mm, wall thickness: 9mm, piston pump tube length: 370mm, suitable for max. 1.5 liters of liquid; stainless steel ball valve SS316; stainless steel fittings SS304; PTFE outlet; machine dimensions and weight: L1550xW1160xH1480mm, 480/600kg; tank dimensions and weight: L1000xW1000xH1800mm, 150/200kg. Iijdsv Nmg Djpfx Ahyjh Please note that our new machine prices are often lower than the typical market prices for used equipment. Feel free to inquire and let us know about your packaging requirements. - Typically, 30-50 different new machines are available from stock for immediate delivery. For machines manufactured to customer specifications, we offer very short lead times starting from around 3 weeks. - All machines are available with a full warranty.

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2018, König Herkules HK1100/2650 L-S lifting tipper Mounting device for Kemper SP150 dough bowls Discharge unit Safety system with laser scanner Year of manufacture: 2018 Isdpfxev S D Dxj Ahyeih Stationary version Maximum load capacity: 980 kg Total height: 380 cm Tipping height: 257 cm With automatic lubrication system for spindle

Tahun pembuatan: 1978, Kondisi: bekas, nomor mesin/kendaraan: NBGMAN 3, Technical specifications: 1 Demag column-mounted slewing crane NL 1000 KG Load capacity at full outreach: 1000 KG / 1 ton Height: approx. 4.3 m, underslung jib height: approx. 3.65 m Outreach: approx. 4 m, Hook height: approx. 3 m Total weight: approx. 1800 kg Including Demag P-Hoist 1000 KG wire rope hoist with pendant control, equipped with trolley and slewing drive Connection: 400V 16A, slewing range: 360° The crane is dismantled and available immediately Iisdjr Igtyspfx Ahyjh Item location: 75053 Gondelsheim Only the crane system shown in the pictures is for sale Used condition, see pictures Shipping via freight forwarder or collection by appointment

Kondisi: sangat baik (bekas), YZ0105) PANEL SAW WITHOUT RETURN TABLE Model HPP 300/56/56 PROFILINE Control system: Power Control POWER TOUCH, Software CADmatic 4 - Professional No. 1 Rear Pusher - (PACK PREMIUM). No. 11 Clamps (1 x Power Concept) Max. cutting width (mm): 5600. Useful stroke of pusher (mm): 5600. Max. saw blade projection (mm): 80 Scoring saw (max. blade diameter / power): mm 180 / kW 1.5 Main saw (max. blade diameter / power): mm 350 / kW 11 (option: kW 18) Adjustable saw carriage feed rate (m/min): 1 - 150 Iedpfx Ahefg Ewzoysih No. 5 Front air cushion tables (mm 500 x 2810) Label printer: PICA II 108 YZ0106) AUTOMATIC PANEL STORAGE SYSTEM Model TFL 211/10/05 Total space requirement (with panel saw): mm 10640 x mm 55660 Movable upper bridge (on the X-axis) with movable carriage (on the Y-axis) and corresponding vacuum suction cup assembly (movable on the Z-axis) Max. speed of movable upper bridge (on the X-axis): 110 m/min Speed of carriage (on the Y-axis): 130 m/min Vacuum suction cup movement speed (on the Z-axis): 70 m/min Vacuum suction cup assembly, rotatable by 90° Automatic TLF management system (via scanner) of cut panels (which remain in storage) Minimum panel dimensions: mm 800 x 2000 Stack dimensions: Min mm 2600 x mm 800 / Max mm 5600 x mm 2200 Panel thicknesses (min/max): mm 12 / 40 Stack height: mm 1000 Min. panel dimensions mm 800 x 2000. Max. panel dimensions mm 2200 x 5600 (ST 61)

Kondisi: baru, Tahun pembuatan: 2026, NEW TO THE POLISH MARKET 230 V Screw Compressor Screw compressors from the Polish brand CORMAK stand for quality and reliability. Our several years of experience in compressor sales have enabled us to design models with an excellent price-to-performance ratio. The presented model is ideal for small workshops or small production businesses. It offers high output (380 l/min) relative to its compact size, allowing the operation of several devices simultaneously. Its very low noise level (60 dB) makes staying in the same room unobtrusive. Thanks to high-quality components, the compressor is designed for continuous operation and can be used in industrial environments. CORMAK Screw Compressors: When you demand top quality and performance! Looking for solutions that go beyond market standards? CORMAK screw compressors are synonymous with innovation and dependability, designed for the most demanding applications. Innovative design: Our compressors are based on advanced engineering and European manufacturing precision. The robust construction, enriched with modern components, ensures long-term, trouble-free operation in any conditions. Efficiency optimization: Thanks to inverter technology and intelligent algorithms, the LUFT 400 dynamically adjusts energy consumption to the current compressed air demand. This results in significantly lower operating costs while maintaining maximum performance. Proven drive system: The LUFT 400 compressor uses a reliable direct drive, minimizing stress on both the screw block and motor, ensuring efficient operation and extended service life. Quiet operation and comfort: Carefully designed details give our compressors exceptionally low noise levels. Effective sound-damping and vibration-reduction systems provide a comfortable working environment, improving concentration and operator well-being. Intelligent control: The intuitive MAM electronic control panel is your compressor's command center. It enables precise parameter monitoring, maintenance scheduling, and rapid diagnostics, delivering stability and protection for key components. Tailored to your needs: We understand each application is unique. CORMAK compressors can be configured with additional air treatment systems, allowing perfect adaptation to your industry's specific requirements. Dynamic operating pressure: Automatic pressure regulation ensures the compressor delivers exactly the compressed air needed at any moment, maximizing energy efficiency and minimizing losses. Sustainability: We focus on environmentally friendly solutions. The energy-efficient technologies used in our compressors not only lower your bills but also limit environmental impact, while a heat recovery option ensures maximum energy utilization. Technical Specifications Motor power: 3.0 kW / 4 HP Iedpfx Ahstz S H Neyjih Voltage: 230V/50Hz Output 0-6 bar: avg. 400 L/min Output at 6 bar: 390 L/min Output at 8 bar: 380 L/min Output at 10 bar: 380 L/min Outlet connection diameter (G): 1/2" Dimensions: 800 x 520 x 740 mm Weight: 95 kg Manufacturer: Cormak

Tahun pembuatan: 2004, Kondisi: baik (bekas), Manufacturer: KUKA Model: KR 210 L 180 Year of manufacture: 2004 Net weight: 1,245 kg Iijdpfxjh Dw Ere Ahyoh

Kondisi: baik (bekas), Bejana bertekanan, tangki bertekanan, ketel bertekanan, -Bejana bertekanan: Bejana udara bertekanan, baja tahan karat -Volume: sekitar 1,5 liter -Nomor artikel: 4541 ABD10 190 -Jumlah: 19 buah bejana tersedia -Harga: per buah -Dimensi: 385/150/T105 mm Iodpfezucb Dsx Ahyoih -Berat: 4,2 kg/buah

Kondisi: sangat baik (bekas), jarak tempuh: 26.653 km, daya: 397 kW (539,77 hp), pendaftaran pertama: 09/2023, jenis bahan bakar: diesel, bahan bakar: diesel, rem: pengereman mesin, warna: hijau, kabin pengemudi: kabin tidur, tipe perpindahan gigi: otomatis, kelas emisi: Euro 6, panjang ruang muatan: 5.000 mm, lebar ruang muat: 2.500 mm, Tahun pembuatan: 2023, jam operasional: 853 h, Perlengkapan: ABS, AdBlue, Bluetooth, kemudi berkuasa, kendali jelajah, komputer bawaan, kontrol traksi, kopling trailer, kunci diferensial, kunci sentral, lampu kabut, pemanas parkir, pendingin udara, pengaturan jendela elektrik, sistem navigasi, spion elektrik, spoiler,

Kondisi: hampir baru (bekas), Tahun pembuatan: 2022, kapasitas angkut: 1.000 kg, tinggi angkat: 5.350 mm, tinggi konstruksi: 2.900 mm, jam operasional: 1.033 h, jenis bahan bakar: listrik, tipe tiang: dupleks, Produsen + model: LINDE V 10 / Tiang: 2W5350 ID: 26083.5198 Kategori: Demo Tiang: 2W Tinggi terendah: 2900 mm Tinggi pengangkatan: 5350 mm Kapasitas: 1000 kg Tinggi platform: 4750 mm Awal: Ya Lebar kabin: 1200 mm Iijdpfjzv Rrtex Ahyjh Tahun: 22 Jam kerja: 1033 jam Kapasitas: 24v / 930ah Opsi: Opsi LENGKAP !! - KEMUDI GANDA !!!! - Gerbang KESELAMATAN khusus !! - Palet yang dapat disesuaikan! - 2 x Lampu biru

Kondisi: hampir baru (bekas), Robot Kuka KR 10 R1140 -2 /SEL KR C 5 dualcab AC Iiedpjzv U S Rsfx Ahyjh Robot industri KRC5 Robot KSP-600-S6 Lengkap dan siap digunakan

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2022, Ditawarkan sebuah kompresor ulir berpelumas oli AiRKO. Daya motor: 7,5kW, kecepatan motor: 3000 RPM, laju aliran volume: 1,02 m³/menit, tekanan operasi maksimum: 10 bar. Pemeriksaan dapat dilakukan setelah perjanjian. Ijdpfxezlkaps Ahyoih

Kondisi: bekas, Tahun pembuatan: 2014, Fungsionalitas: berfungsi sepenuhnya, de-001 Ijdpfjwyg Alox Ahysih

Kondisi: sangat baik (bekas), pendaftaran pertama: 03/2017, panjang ruang muatan: 94.100 mm, lebar ruang muat: 2.550 mm, warna: hijau, Tahun pembuatan: 2017,

Kondisi: baru, Tahun pembuatan: 2025, Horizontal packaging machine, MINI VERSION, for pre-made doypacks, block bottom bags, or flat pouches. Modules for specific pouch features such as zip/press closure, screw cap (spout), and gusset form can be integrated. Optional: batch/date printer, gas flushing module. Pouch detectors verify correct placement and full opening of the doypack pouch. As soon as the pouch is detected, the product is filled into the pouch via the filling spout. The sealing area remains clean during this process. A special gripping system holds the stand-up pouch precisely in position during filling, before the doypack is closed and sealed. MITSUBISHI PLC, SMC vacuum filter, OMRON PID temperature control, AIRTAC cylinders. – Specifications: Stainless steel housing (SS304); max. machine cycle rate: 10 cycles/min (no load); pouch width: 250–450mm; pouch length: 250–500mm; required compressed air: 6.5 bar, 0.2 m³/min; power supply: 220V, single phase; machine dimensions: L1150xW950xH1570mm. Please note that our new prices are often below typical used equipment prices. Feel free to inquire and tell us about your packaging requirements. – We generally have 30–50 different new machines available immediately from stock. For custom-built machines, we offer extremely short delivery times starting from approximately 3 weeks. – All machines are supplied with full warranty. Iisdpov Nllrsfx Ahysh

Kondisi: baru, Tahun pembuatan: 2025, Vertical packaging machine including dosing unit(s) with 10 production lines for manufacturing “stick-packs” with a center back seal (alternatively: 3- or 4-side seal available at extra cost) for packaging powder products (pepper, milk powder, etc.). PLC and color touchscreen from OMRON, self-diagnostics function. Pneumatic components from AIRTAC, temperature PID control by OMRON, electronic components by SCHNEIDER and OMRON. Film transport and AB converter control, stainless steel construction (SS304), auger dosing unit with servomotor, with hopper. – Specifications: Accuracy: +/- 0.3-1%; max. machine output in idle mode: 10x60 cycles/minute; packaging accuracy: +/-10%; suitable for all BOPP/PE and laminated films; bag sizes: L(50-350) x W(10-38)mm; power supply: 220V, 6.5kW; compressed air: 1.5m³/min, 6bar; machine dimensions: L1800 x W1500 x H1900mm; weight: 750kg. Iedpsv Nmf Tefx Ahyeih The machine/line is also available in various versions for different packaging sizes and packing speeds. Please note that our new machine prices are often below typical used equipment prices. Feel free to contact us with your packaging requirements. – Normally, 30-50 different new machines are immediately available from stock. For custom-built units, we offer very short delivery times starting from about 3 weeks. – All machines come with full warranty.

Tahun pembuatan: 2025, Kondisi: baru, Multihead weigher specifically designed for fresh, moist fruits, fresh vegetables, sliced/diced meat, etc. – Weighing unit with 8 linearly arranged weighing heads and 8 intermediate hoppers for greater accuracy and speed, spiral conveyor feed. – Suitable for filling into bags, trays, cans, jars, etc., easy to clean. – Specifications: max. machine cycle rate (idle): 45 cycles/minute; accuracy: +/- 0.1–3.0g; weighing hopper volume: max. 1L; weight range: 10–2000g; power supply: 220V, 1.5kW; stainless steel; IP65 protection; machine dimensions and weight: L2320xW840xH1820mm, 350kg. The machine/system is also available in other versions for different packaging sizes and speeds. Please note that our new prices are often below typical used prices. Simply contact us and let us know your packaging requirements. – As a rule, 30–50 different new machines are always immediately available from stock. For custom-built machines, we can also offer very short delivery times from approx. 3 weeks. – All machines come with a full warranty. Isdpjv Nmt Rjfx Ahyeih

Tahun pembuatan: 2025, Kondisi: baru, Weighing unit with 2 heads. - Specifications: Max. weight 1000g/1000ml (depending on product); Accuracy: 0.5–1.0g; 220V/1kW; max. machine cycle rate in idle mode: 25 cycles/minute. The machine/system is also available in further versions for different packaging sizes and speeds. Please note that our new prices are often below the usual prices for used equipment. Feel free to contact us and let us know your specific packaging requirements. - We generally have 30–50 different new machines available from stock for immediate delivery. For customer-specific machinery, we also offer very short lead times starting from approx. 3 weeks. - All machines are supplied with a full warranty. Iijdpfxev Nmvle Ahyoh

Kondisi: bekas, jarak tempuh: 10.636 km, tipe perpindahan gigi: lain, jenis bahan bakar: listrik, warna: merah, berat keseluruhan: 1.330 kg, berat kosong: 700 kg, berat muatan maksimum: 150 kg, jumlah tempat duduk: 1, pendaftaran pertama: 11/2015, kelas emisi: tidak ada, suspensi: lain, Tahun pembuatan: 2015, jam operasional: 10.636 h, kabin pengemudi: lain, bahan bakar: listrik,

Kondisi: bekas, konfigurasi gandar: 3 gandar, beban gandar yang diizinkan (gandar 1): 9.000 kg, beban gandar yang diizinkan (gandar 2): 9.000 kg, beban gandar yang diizinkan (gandar 3): 9.000 kg, pendaftaran pertama: 10/2024, panjang total: 11.390 mm, lebar total: 2.550 mm, suspensi: udara, ukuran ban: 385/65, kondisi ban: 30 persen, jarak roda: 9.270 mm, warna: lain, Tahun pembuatan: 2024, Perlengkapan: ABS,

Kondisi: sangat baik (bekas), Tahun pembuatan: 2018, Sistem sambungan profil bergerigi Weinig GRECON Iiedpfezx Tddjx Ahyoh Tipe ProfiJoint 10/6100 LI

Kondisi: baru, daya: 129 kW (175,39 hp), jenis bahan bakar: diesel, berat keseluruhan: 3.500 kg, warna: putih, tipe perpindahan gigi: otomatis, jumlah tempat duduk: 3, volume ruang muat: 25 m³, panjang ruang muatan: 5.000 mm, lebar ruang muat: 2.250 mm, tinggi ruang muatan: 2.300 mm, Perlengkapan: ABS, kunci sentral, pemanas parkir, pendingin udara, program stabilitas elektronik (ESP), sistem navigasi, tail lift,

Kondisi: bekas, Tahun pembuatan: 1998, Mesin Pembuatan Jendela Merek: Weinig Tipe: Unicontrol 10-5 Tahun Pembuatan: 1998 Data Teknis Lebar Kerja: 40 - 220 mm Tinggi Kerja Pemrosesan Longitudinal: 40 - 100 mm Tinggi Kerja Pemrosesan Transversal: 40 - 100 mm (tinggi penahan 80 mm) Panjang Benda Kerja Pemrosesan Longitudinal: min. 220 mm + 2 x panjang tang Panjang Benda Kerja Pemrosesan Transversal: min. 275 mm + 1 x panjang tang dengan diameter alat 320 mm Ijdpjzuyxgsfx Ahyoih Pengumpanan (Pemrosesan Transversal) Daya Motor: 0,3 kW Kecepatan Pengumpanan: 3 - 25 m/menit Penjepit Benda Kerja: menggunakan 2 penjepit Penyangga Panjang: dengan skala dan kaca pembesar untuk dimensi luar rangka atau daun jendela Penahan: dioperasikan secara pneumatis - 4 posisi - (tidak untuk jendela Studio) hingga tinggi kayu maks. 80 mm Paket Komponen Ganda: Untuk pemberian makan komponen tunggal atau ganda. Dengan penataan transversal dan sistem penahan 1. Kayu (terletak pada penyangga) Lebar Kayu: 55 - 90 mm 2. Kayu Lebar Kayu: 130 mm Pengumpanan (Pemrosesan Longitudinal) Daya Motor: 2,2 kW Kecepatan Pengumpanan: 4 - 18 m/menit (dapat disesuaikan melalui konverter frekuensi) Jarak Rol Pengumpanan: 100/120 mm Lebar Rol Pengumpanan: 30/50 mm Diameter Rol Pengumpanan: 95 mm Unit Pemrosesan Gergaji Pemotong Daya Motor: 3 kW Diameter Spindel: 40 mm Kecepatan Spindel: 2800 RPM Lingkaran Putar Alat: maks. 400 mm Penyesuaian Aksiial: secara pneumatis terhadap revolver 4 arah 1. Spindel Tang dan Alur Daya Motor: 11 kW Diameter Spindel: 50 mm Kecepatan Spindel: 3250 RPM Lingkaran Putar Alat: maks. 320 mm Panjang Penjepitan Alat: 320 mm Jarak Penyesuaian Aksiial: 240 mm Jumlah Alat: 4 x 80 mm Penyesuaian Aksiial: hidraulis 1. Spindel Pembentuk Daya Motor: 11 kW Diameter Spindel: 50 mm Kecepatan Spindel: 6000 RPM Diameter Alat: maks. 232 mm Lingkaran Putar Alat Nol: 130 hingga 140 mm Panjang Penjepitan Alat: 320 mm Jarak Penyesuaian Aksiial/Radial: 240/80 mm Jumlah Posisi Alat: 4 x 80 Penyesuaian Aksiial: hidraulis 2. Spindel Pembentuk Daya Motor: 11 kW Diameter Spindel: 50 mm Kecepatan Spindel: 6000 RPM Diameter Alat: maks. 232 mm Lingkaran Putar Alat Nol: 130 hingga 140 mm Panjang Penjepitan Alat: 320 mm Jarak Penyesuaian Aksiial/Radial: 240/80 mm Jumlah Posisi Alat: 4 x 80 mm Penyesuaian Aksiial: hidraulis 2 Rem Spindel Mekanis untuk Spindel Pembentuk 3 Rem Spindel Mekanis untuk Gergaji Pemotong dan Unit Pembentuk dan Penggergajian Unit Pemotong Profil (horizontal di atas) di depan spindel pembentuk terakhir dioperasikan secara radial pada 2 posisi dioperasikan secara aksiial pada 2 posisi Daya Motor: 3 kW Diameter Spindel: 40 mm Kecepatan Spindel: 5850 RPM Lingkaran Putar Alat: 130 mm Panjang Penjepitan Alat: 40 mm Jarak Penyesuaian Aksiial: 52 mm Jarak Penyesuaian Radial: 125 mm Unit Pemotong Profil (vertikal di sebelah kanan) di ujung mesin dioperasikan secara radial pada 2 posisi dioperasikan secara aksiial pada 2 posisi Daya Motor: 3 kW Diameter Spindel: 40 mm Kecepatan Spindel: 5850 RPM Lingkaran Putar Alat: 210 mm Panjang Penjepitan Alat: 160 mm Jarak Penyesuaian Aksiial: 90 mm Jarak Penyesuaian Radial: 100 mm Spindel Tang dan Alur dengan panjang penjepitan alat 640 mm (sebagai pengganti spindel 320 mm) Daya Motor: 15 kW Kecepatan Spindel: 2925 RPM Jumlah Posisi Alat: 8 x 80 mm Jarak Penyesuaian Aksiial: 560 mm Lampu Pengarah Laser untuk Gergaji Pemotong untuk mendeteksi bagian Peralatan Jendela Studio Penyangga Panjang yang Dapat Diputar +/- 60 dengan tampilan digital elektronik dan penjepit pneumatis Bilah Penahan Ge

Kondisi: bekas, Tahun pembuatan: 2025, kapasitas angkut: 454 kg, tinggi angkat: 3.490 mm, berat kosong: 118 kg, tinggi konstruksi: 1.990 mm, Platform kerja khusus Iiedpfszu D Urjx Ahyeh

Kondisi: sangat baik (bekas), MESIN PEMOTONG TEPING (SEBELAH KIRI) Ketebalan tepian pada rol (min/maks) mm 0,3 / 3 Ketebalan tepian pada bilah/strip (min/maks) mm 0,4 / 20 Ketebalan papan (min/maks) mm 8 / 60 Sistem kontrol POWER CONTROL PC23 Powertouch / WoodCommander (Siap TAPIO) Kecepatan pengumpanan m/menit 16-25 Tekanan atas, digerakkan oleh sabuk berbentuk V Unit penyemprot pelumas di bagian atas/bawah Penggaris penahan yang dapat disesuaikan, dikendalikan oleh C.N. Unit pemotong alur 2 x Kw 3 Pemanas untuk menghilangkan panas pada sisi benda kerja Unit perekat (perekat lelehan panas + pra-pemanas) FE-MA-TECH + QA/PU + PU65 Zona penekan tepian (dikendalikan oleh CN) "C 7" Majalah tepian untuk rol (kompartemen No. 2) dengan pengumpanan tepian SERVO Unit pemotong PK 25 (2 x Kw 0,8) maks 25 m/menit Unit pemotong awal BF20 (2 x Kw 1,5) Unit pemotong profil ganda MF21 (2 x Kw 0,55) 0°-20° Iiodpjzku Rpofx Ahysh Unit multifungsi (pemotongan radius dan unit pemotong profil) FK 30/V20 (1 x Kw 0,7) dikendalikan oleh CN Unit pemotong universal untuk membuat alur/rabung dan membentuk profil SF 21 (1 x Kw 5) 0°-90° Unit pisau pemotong profil ganda MN 21 (dikendalikan oleh CN) Pisau pemotong datar FA20 Unit penghalus FA06 (2 x kW 0,18) + ruang kosong