Beli Efector Ibe 2020-Frog bekas (2.305)

Kondisi: bekas, Inductive sensor, electronic sensor, safety switch, inductive proximity switch - Manufacturer: efector, inductive proximity sensor unused, original packaging - Product type: IIBE 2020-FROG - Quantity: 3 sensors available - Price: per unit - Carton dimensions: 135/65/H45 mm Ljdsm Ui H Sspfx Afieaa - Weight: 0.2 kg per carton

Kondisi: hampir baru (bekas), jarak tempuh: 330.000 km, jenis bahan bakar: hibrida, kelas emisi: Euro 6, Tahun pembuatan: 2020,

Kondisi: bekas, Inductive sensor, electronic sensor, safety switch, inductive proximity switch Lajdpfsm Ui Ipjx Afisa - Manufacturer: efector, unused inductive proximity sensor in original packaging - Product type: ITB 3001-BPOG - Quantity: 2 sensors available - Price: per piece - Carton dimensions: 150/125/H30 mm - Weight: 0.1 kg per carton

Kondisi: hampir baru (bekas), Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: FR Jungheinrich, Tahun pembuatan: 2020, kapasitas angkut: 1.000 kg, tinggi angkat: 6.200 mm, jenis bahan bakar: listrik, tipe tiang: telescopik, tinggi konstruksi: 2.600 mm, panjang garpu: 1.200 mm, kondisi ban: 95 persen, Perlengkapan: geser samping, pelindung kepala, pencahayaan, hu Lsdpfx Afopq Id Rsijaa

Kondisi: sangat baik (bekas), Tahun pembuatan: 2020, Elektron Metalldetektor Öffnungsmaß: 180 mm breit x 405 mm hoch Bandlänge: 1500 mm Ausführung aus Edelstahl Zwei Betriebsmodi: Alarm mit Stoppfunktion oder Ausblasung mit Druckluft Ausschleusebehälter Laedpevw D Iusfx Afija In exzellentem Zustand

Kondisi: bekas, Tahun pembuatan: 2021, blechbiege-2020mm-1,5mm-hu Ledpfx Ajy Erw Eofijaa

Kondisi: baik (bekas), Tahun pembuatan: 2020, jam operasional: 2.076 h, kapasitas angkut: 2.000 kg, jenis bahan bakar: listrik, berat kosong: 900 kg, jarak tempuh: 2.076 km, Pallet elektrik ride-on merek STILL ini berasal dari tahun 2020; HANYA 2.076 jam di meter; Panjang fork 1.600 mm; Pallet truck memiliki kapasitas 2.000 kg; Baterai tahun 2020 dilengkapi dengan sistem isi ulang otomatis dan charger EKSTERNAL; Buat janji untuk test drive. Ljdpjxwluxjfx Afieaa

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2020, kapasitas angkut: 6.300 kg, For sale is an as-new indoor crane system from the brand Konecranes. The crane is a CXTS model (single-girder overhead crane / profile girder) and is in excellent condition. NOTE: The crane shown in the listing photos has unfortunately already been sold. However, an identical crane is available, although it will only be available from the end of 2026. TECHNICAL DETAILS: - Load capacity: 6,300 kg - Span: 18,600 mm - Lifting height: 6.00 m - Year of manufacture: 2020 - Lifting speed: 4.0 / 0.7 m/min (2-speed) Laodpeykbimofx Afioa - Trolley travel speed: 20.0 m/min (infinitely variable) - Crane travel speed: 32.0 m/min (infinitely variable) MACHINE DETAILS: - Weights: Trolley weight: 440 kg; Crane weight without trolley: 1,832 kg - Classification: Crane class: S3 (DIN 15018); Hoist mechanism group: FEM 2m (ISO M5), Crane drive mechanism group: FEM 1Am (ISO M4) - Electrical data: Power supply: 400 V / 48 V / 50 Hz, Rated power: 4.9 kW EQUIPMENT: - Radio control with push-button transmitter - Additional movable control (emergency control) - Overload protection and load data logger - Limit and final switches for crane and trolley travel - Signal horn, charging station, and spare battery - Hook collision protection Transport dimensions of the crane bridge: - Total length: 19,328 mm - Girder profile height: 622 mm - End carriage width (wheelbase): 2,200 mm Transport and loading can be organised Europe-wide for an additional charge upon request. Prices are plus VAT. Inspection possible by appointment. Contact us—our team looks forward to assisting you. Trade-in or exchange possible! Machine Purchase & Sales PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINERY, AND MORE. Are you looking for a high-quality yet affordable metalworking machine for your production? Or are you looking to sell yours? For more information or contact options, please visit our website.

Kondisi: bekas, Tahun pembuatan: 1992, Sheet width: 2050 mm Sheet thickness: 10.0 mm steel Bending capacity: 8.0 mm steel Top roll diameter: approx. 205 mm Side roll diameter: approx. 195 mm Control: conventional Oil capacity: 80.0 liters Voltage: 380 V Total power requirement: 5.5 kW Weight: 3200 kg Dimensions (L x W x H): 4500 x 1500 x 1300 mm Features: - Robust electro-hydraulic 3-roll plate bending machine - 3-roll concept offers a wide range of bending and rolling options - Swivelling control unit at the front * Operation – control of all rolls and machine axes * Digital position display * Manual operation via joysticks - Diameters up to 1.1 times the top roll diameter achievable Lodpoxacdvsfx Afisaa - Forged and hardened rolls with a hardness of 53-55 HRC - Low-maintenance, stable machine design - Sturdy steel welded construction - Electro-hydraulic drop-end for easy removal of pipes - Manometer / pressure indicator for the rolls - Safety device (safety cable with switch unit) - Operating instructions (PDF)

Kondisi: bekas, jarak tempuh: 286.330 km, daya: 345 kW (469,07 hp), pendaftaran pertama: 06/2011, jenis bahan bakar: diesel, berat kosong: 15.750 kg, berat muatan maksimum: 19.250 kg, berat keseluruhan: 35.000 kg, konfigurasi gandar: 8x2, jarak roda: 4.900 mm, rem: pengereman mesin, warna: merah, kabin pengemudi: kabin harian, tipe perpindahan gigi: otomatis, kelas emisi: Euro 5, suspensi: udara, jumlah tempat duduk: 2, Perlengkapan: ABS, derek, kabin, kebisingan rendah, kemudi berkuasa, kendali jelajah, komputer bawaan, kontrol traksi, kopling trailer, kunci diferensial, kunci sentral, lampu depan tambahan, lampu kabut, pemanas jok, pendingin udara,

Tahun pembuatan: 2020, Kondisi: bekas, de_001 Ledpfxexb Syvo Afisaa

Kondisi: baru, Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2020, daya: 1,3 kW (1,77 hp), konfigurasi gandar: 2 gandar, kapasitas angkut: 159 kg, tinggi angkat: 8.020 mm, daya angkat: 159 kg/m, panjang platform: 1.400 mm, lebar platform: 750 mm, berat keseluruhan: 1.112 kg, tinggi konstruksi: 1.980 mm, ukuran ban: 25 × 8 × 20 cm, kondisi ban: 100 persen, jarak ke tanah: 60 mm, warna: biru, Perlengkapan: Pemeriksaan keselamatan UVV, === MAIN TECHNICAL DATA === Year of manufacture: 2020 Operating hours: 0 (new / unused) Working height: 8.02 m Platform height: 6.02 m Lifting capacity: 159 kg Platform dimensions (L x W): 1400 x 750 mm Slew range: Not applicable (fixed mast, no rotation) Drivable at full height: Yes Drive: Electric (24V, 4×6V 225Ah batteries) Battery condition: New Tyres: Solid rubber / Non-marking Transport width: 800 mm Transport height (folded): 1980 mm Weight: 1112 kg CE certification: Yes === HIGHLIGHTS === Compact and highly manoeuvrable self-propelled vertical mast lift Fully proportional Smart Link™ joystick control Maintenance-free AGM batteries with integrated charger Emergency lowering, tilt alarm and dual wheel brakes CE certified and immediately ready for use === CONDITION === Excellent operating condition – fully inspected, serviced and tested by certified specialists. Machine is new / unused. Viewing possible on request. === LOCATION & DELIVERY === Location: Sittard, Netherlands. Worldwide delivery available. Price €8,250 (EXW / plus VAT). Laedpfxexctzko Afisa The Genie GR-20 is a reliable and highly compact vertical mast lift, ideal for indoor use such as warehouses, maintenance and installation work. With a working height of 8.02 m, a capacity of 159 kg and a narrow transport width of only 80 cm, it fits easily through standard doors and lifts. Equipped with maintenance-free AGM batteries, proportional control and full CE certification. Ready for immediate use and transport. === DELIVERY === Crane loading available on request for smooth transport. Flexible shipping options tailored to your destination and logistical requirements. All transport is professionally handled by the Collé Rental & Sales logistics team.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2020, daya: 26,6 kW (36,17 hp), kapasitas angkut: 600 kg, tinggi angkat: 20.000 mm, daya angkat: 600 kg/m, panjang platform: 4.300 mm, lebar platform: 1.190 mm, berat keseluruhan: 12.350 kg, berat kosong: 12.350 kg, panjang transportasi: 4.720 mm, lebar transportasi: 1.250 mm, tinggi transportasi: 2.990 mm, tinggi konstruksi: 3.820 mm, jenis bahan bakar: listrik, ukuran ban: 28 × 10 – 22 (Non-marking), kondisi ban: 100 persen, jarak roda: 3.180 mm, jarak ke tanah: 200 mm, warna: merah, Perlengkapan: Pemeriksaan keselamatan UVV, gerobak kemiringan, penggerak semua roda, === KEY SPECIFICATIONS === Year of manufacture: 2020 Operating hours: 8 h Machine width: 1.25 m Drive system: 4x2 Driveable at full height: Yes Platform extension: Yes (1.8 m) Power: 26.6 kW total (Lifting 2×8.0 kW + Drive 4×3.3 kW) Lajdpfxoxb S Rnj Afioa Working height: 22.0 m Lifting capacity: 600 kg Drive type: Electric Battery type: Lead-acid 48V / 630Ah Self-leveling outriggers: Yes (standard) Platform size (L × W): 4.30 × 1.19 m Tyre type: Non-marking CE certification: Yes Weight: 12,350 kg Indoor / Outdoor use: Both === HIGHLIGHTS === Carefully sourced from reliable suppliers with verifiable history CE certification and full documentation included Ready for immediate use and transport Fully electric, low-noise, and emission-free Extendable platform (1.8 m) for increased working area === CONDITION === Excellent condition, only 8 operating hours. Original batteries tested and in outstanding condition. Immediately available from stock in Sittard. === LOCATION & DELIVERY === Location: Sittard, Netherlands. Worldwide delivery available. Price on request (EXW / plus VAT). The Magni ES 2212 E is a fully electric scissor lift with 22 m working height and 600 kg lifting capacity. Thanks to its compact design, non-marking tyres, and zero emissions, it is ideal for indoor use and maintenance tasks. CE certified, low-maintenance, and ready for operation. === SHIPPING === Crane loading available on request. Flexible shipping options depending on destination and logistics preferences. All transports are professionally handled by the Collé Rental & Sales logistics team.

Kondisi: baru, Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2020, jam operasional: 9 h, daya: 18 kW (24,47 hp), konfigurasi gandar: 4x4, kapasitas angkut: 230 kg, tinggi angkat: 20.280 mm, daya angkat: 230 kg/m, berat keseluruhan: 9.590 kg, tinggi konstruksi: 2.490 mm, ukuran ban: 315 / 55 D 20 – non-marking terrain banden, kondisi ban: 100 persen, warna: merah, Perlengkapan: Pemeriksaan keselamatan UVV, penggerak semua roda, en Lodpfxoxu Irhe Afijaa

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, daya: 100 kW (135,96 hp), tipe perpindahan gigi: hidrostatik, jenis bahan bakar: diesel, konsumsi bahan bakar per jam: 9 l/j, kapasitas tangki bahan bakar: 175 l, warna: merah, berat keseluruhan: 15.900 kg, berat muatan maksimum: 5.000 kg, daya angkat: 5.000 kg/m, tinggi angkat: 22.900 mm, ukuran ban: 445/65 R22.5, kondisi ban: 90 persen, konfigurasi gandar: 4x4, jumlah tempat duduk: 1, kelas emisi: Euro 5, tipe tiang: telescopik, Tahun pembuatan: 2020, jam operasional: 2.676 h, Perlengkapan: Pemeriksaan keselamatan UVV, derek, garpu palet, kabin, kontrol traksi, kunci diferensial, lampu depan tambahan, pemanas parkir, pendingin udara, penggerak semua roda, === MAIN TECHNICAL DATA === Year of manufacture: 2020 Operating hours: 2,676 hrs Maximum lifting capacity: 5,000 kg Maximum lifting height: 22.90 m Maximum outreach: 19.50 m Rotation: 360° continuous Stabilisers: Yes (swivel type) Drive: Diesel Transmission: Hydrostatic / automatic All-wheel drive: Yes (4WD – 4WS) Steering modes: Front / Coordinated / Crab steering Cab: Enclosed with heating and air conditioning Heated cab: Yes Remote control: Pre-installed wiring Telescopic boom: Yes Forks / Jib / Winch included: Forks (Q-Fit system) Tyres: Off-road tyres (445/65 R22.5) Engine manufacturer: Deutz TCD 3.6 L4 Emission standard: Stage V Power: 100 kW (136 HP) Weight: 16,400 kg CE Certification: Yes Price: €109,500 (EXW, plus VAT) === HIGHLIGHTS === Carefully selected from reliable sources with traceable history CE-certified and complete documentation included Ready for immediate use and transport Comprehensive technical documentation available === CONDITION === Excellent operating condition – fully inspected, serviced, and tested by certified specialists. Viewing available upon request. Lodsxtpfyjpfx Afioaa === LOCATION & DELIVERY === Location: Sittard, Netherlands. Worldwide shipping available. Price: €109,500 (EXW / plus VAT). The Magni RTH 5.23 is a high-performance, rotating telehandler with a lifting height of 22.9 m and a lifting capacity of 5 tonnes. Equipped with a Deutz Stage V engine, swivel outriggers, and MCTS touchscreen for top performance and safety. Fully CE-certified and ready for immediate use from our stock in Sittard. === DELIVERY === Crane loading available on request for smooth shipment. Flexible delivery options according to your destination and logistics requirements. All transport is professionally managed by the Collé Rental & Sales logistics team.

Kondisi: baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2020, kapasitas angkut: 600 kg, tinggi angkat: 30.000 mm, daya angkat: 600 kg/m, panjang platform: 5.800 mm, lebar platform: 1.200 mm, berat keseluruhan: 21.500 kg, panjang transportasi: 6.420 mm, lebar transportasi: 1.390 mm, tinggi transportasi: 3.190 mm, tinggi konstruksi: 3.190 mm, jenis bahan bakar: listrik, kondisi ban: 80 persen, jarak roda: 4.870 mm, jarak ke tanah: 200 mm, warna: biru, Perlengkapan: penggerak semua roda, === TECHNICAL DATA === Year of manufacture: 2020 Operating hours: On request Machine width: 1.39 m Drive: 4x4 (all-wheel drive) with four-wheel steering (4WS) Driveable at full height: Yes Extendable platform deck: Yes (1.90 m extension) Power: Electric drive, 80 V / 560 Ah Working height: 32.00 m Lasdex Nft Iepfx Afioa Platform capacity: 600 kg Drive type: Electric Battery type: Lead-acid Self-leveling outriggers: Yes Platform dimensions (L × W): 5.80 × 1.20 m Tire type: Non-marking (solid rubber) CE certification: Yes Own weight: 21,500 kg Indoor / outdoor use: Indoor & outdoor === HIGHLIGHTS === Carefully selected from reliable sources with traceable history CE-certified incl. full documentation Immediately ready for use and transportable Comprehensive technical documentation available === CONDITION === Clean original condition with well-maintained systems. Batteries tested and in good condition. Immediately available from stock in Sittard. === LOCATION & DELIVERY === Location: Sittard, Netherlands. Worldwide delivery possible. Price on request (EXW / plus VAT). Reliable machines with professional technical support. All machines are fully inspected, CE-compliant, and ready for immediate use. Spare parts and service available on request. === DELIVERY === Crane loading available on request. Flexible transport solutions tailored to the destination. Logistics managed by Collé Rental & Sales.

Kondisi: baru, Tahun pembuatan: 2020, tinggi angkat: 120 mm, pengangkatan bebas: 120 mm, jenis bahan bakar: listrik, daya: 1 kW (1,36 hp), produsen motor: EP Equipment, produsen baterai: Lithium Ion, kapasitas baterai: 30 Ah, tegangan baterai: 24 V, panjang garpu: 1.150 mm, de-to-hu-it-lt-001 Ledpfx Aoxctzqjfieaa

Kondisi: bekas, Tahun pembuatan: 2020, jam operasional: 5.400 h, gaya penjepit: 400 kN, volume langkah: 475 cm³, tekanan injeksi: 1.650 batang, berat keseluruhan: 24.500 kg, diameter konveyor sekrup: 55 mm, Dasar Pengiriman: ex lokasi Waktu Pengiriman: sesuai kesepakatan Laedpfxjv S H Rho Afisa Syarat Pembayaran: 100% sebelum pengambilan mesin, bersih tanpa potongan

Kondisi: bekas, Tahun pembuatan: 2020, jam operasional: 1.600 h, gaya penjepit: 400 kN, volume langkah: 475 cm³, tekanan injeksi: 1.650 batang, berat keseluruhan: 24.500 kg, diameter konveyor sekrup: 55 mm, Dasar Pengiriman: ex lokasi Waktu Pengiriman: sesuai kesepakatan Syarat Pembayaran: 100% sebelum pengambilan mesin, bersih tanpa potongan Laodpov S H Rbefx Afioa

Kondisi: bekas, Tahun pembuatan: 2020, jam operasional: 4.200 h, gaya penjepit: 90 kN, volume langkah: 113 cm³, tekanan injeksi: 2.400 batang, berat keseluruhan: 7.500 kg, diameter konveyor sekrup: 30 mm, Dasar Pengiriman: ex lokasi Lasdov S H N Rjpfx Afija Waktu Pengiriman: sesuai kesepakatan Syarat Pembayaran: 100% sebelum pengambilan mesin, bersih tanpa potongan

Tahun pembuatan: 2020, Kondisi: bekas, Tahun pembuatan: April 2020 Baru: Tidak Nomor seri: Z 11 Y065066 Belum diuji. Laedsy D Nynepfx Afiea Tanpa garansi. Silakan hubungi kami jika Anda tidak menemukan yang Anda cari.

Kondisi: sangat baik (bekas), Tahun pembuatan: 2020, ACSYS Laedpfjyi Twgex Afiea Model: BARRACUDA® Custom Dual FL70S ACSYS Laser Processing System BARRACUDA® Custom Dual FL70S Fiber Laser – Industrial Laser System – Year of manufacture 2020 For sale: a high-quality ACSYS laser processing system, model BARRACUDA Custom Dual FL70S, engineered and manufactured in Germany. The machine is in excellent, well-maintained condition and is a professional industrial unit designed for precise laser marking, engraving, and material processing. The system is equipped with two air-cooled fiber lasers (2×70 W), making it ideal for serial production runs, industrial marking, engraving, inscriptions, and the processing of complex components. Thanks to its robust granite axis structure and fully enclosed safety cabin, the machine operates with exceptional precision, reliability, and safety (Laser Class 1). Perfectly suited for industry, metalworking, automotive suppliers, toolmaking, electronics, nameplates, DataMatrix codes, barcodes, serial numbers, and more. Capabilities of the Machine: - High-precision laser engraving and marking on metal and a wide range of materials - Serial marking, nameplates, QR / DataMatrix codes, logos, numbering - Processing of large layouts without misalignment (Large Field Removal Option) - 3D component processing possible - Camera positioning system for exact workpiece alignment - Automated processes / Industry integration possible (PLC, network, USB) - Low-maintenance, air-cooled fiber lasers with a long service life - Enclosed, industrial-grade safety system (Laser Class 1) Equipment / Options: - Camera system LAS – Live Adjust System HD - Large Field Removal (LFR) – processing of large fields without misalignment - Industrial PC control with ACSYS Software Suite - Network / USB / PLC integration - Automatic door & safety monitoring - Internal lighting & status indicator light - Climate-controlled control cabinet - Extraction and filtration system for laser fumes - Extraction and filter unit (ULT LAS 1500) - Max. air volume: 3,240 m³/h - Rated air volume: 1,200 m³/h - Max. vacuum: 3,450 Pa - Power: approx. 2.2 kW - Weight: approx. 300 kg Technical data: Machine - Manufacturer: ACSYS Lasertechnik GmbH (Made in Germany) - Model: BARRACUDA® Custom Dual FL70S - Year built: 04/2020 - Lasers: 2 × 70 watt fiber lasers (air-cooled) - Wavelength: 1055 – 1070 nm - Processing area: approx. 570 × 570 mm - Axis travel: - X: approx. 875 mm - Y: approx. 600 mm - Z: approx. 190 mm Electrical data: - Connection: 3AC / N / PE 400 V - Frequency: 50 Hz - Power consumption: approx. 5.5 kW Dimensions & Weight: - Cabin width: approx. 2,050 mm - Cabin height: approx. 2,300 mm (approx. 2,600 mm with indicator light) - Cabin depth: approx. 2,850 mm - Total machine weight: approx. 3,800 kg Condition: used Scope of delivery: (see photo) (Specifications and technical details subject to change and errors excepted!) For further questions, please feel free to contact us by telephone.

Kondisi: sangat baik (bekas), jarak tempuh: 85.691 km, daya: 118 kW (160,44 hp), pendaftaran pertama: 08/2020, jenis bahan bakar: diesel, ukuran ban: 195/75R16, konfigurasi gandar: 4x2, jarak roda: 4.100 mm, bahan bakar: diesel, warna: putih, tipe perpindahan gigi: mekanis, jumlah gigi: 6, kelas emisi: Euro 6, suspensi: baja, panjang total: 6.800 mm, lebar total: 2.100 mm, tinggi total: 2.400 mm, beban gandar yang diizinkan (gandar 1): 2.100 kg, beban gandar yang diizinkan (gandar 2): 2.600 kg, Tahun pembuatan: 2020, Perlengkapan: ABS, AdBlue, Bluetooth, Port USB, filter jelaga, kantung udara, kemudi berkuasa, komputer bawaan, kontrol traksi, kopling trailer, kunci sentral, pendingin udara, pengaturan jendela elektrik, program stabilitas elektronik (ESP),

Kondisi: sangat baik (bekas), Tahun pembuatan: 2004, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 2550, Pembungkus palet, mesin pembungkus dengan meja putar, mesin pengemasan palet dengan meja Produsen: Boehl Tipe: BLZ 2020 Tahun: 2004 No. Mesin: 2550 Ukuran meja putar: 2000 mm Ljdpfxjy Dun Do Afioaa Tinggi pembungkusan: H-2618 mm

Kondisi: sangat baik (bekas), jarak tempuh: 680.321 km, daya: 316 kW (429,64 hp), pendaftaran pertama: 01/2020, jenis bahan bakar: diesel, ukuran ban: 295/60 R 22.5, konfigurasi gandar: 4x2, jarak roda: 3.600 mm, bahan bakar: diesel, kapasitas tangki bahan bakar: 960 l, warna: hitam, kabin pengemudi: kabin tidur, tipe perpindahan gigi: otomatis, kelas emisi: Euro 6, suspensi: udara, beban gandar yang diizinkan (gandar 1): 7.500 kg, beban gandar yang diizinkan (gandar 2): 11.500 kg, Tahun pembuatan: 2020, Perlengkapan: ABS, AdBlue, EBS (Sistem Rem Elektronik), bantuan mulai menanjak, filter jelaga, kantung udara, kemudi berkuasa, kendali jelajah, komputer bawaan, kontrol traksi, kopling trailer, kulkas, kunci diferensial, kunci sentral, lampu kabut, pemanas parkir, pendingin udara, pengaturan jendela elektrik, program stabilitas elektronik (ESP), spion elektrik, spoiler, tangki bahan bakar kedua,