HH2-2-back column is my company to design and manufacture a high-efficiency, multi-purpose portable lifting equipment underground mine. It retracement at various angles buried underground metal pillars and other buried devices. For retracement mining height greater than one meter of conventional mining, blasting mining and pillar atmining face are applicable, in addition, can also serve as an auxiliary tool in the coalface doing pulling, lifting other heavy work. The product has the following characteristics: (i) safe, reliable, durable; (ii) the operation and maintenance easy; (iii) high intensity, small size, light weight, easy to carry; (iv) pulling force, the small handle power and high efficiency. 1. The pullout force (maximum): 5t 2. Drawing distance (maximum): 3m 3. Handle force (maximum): 500N 4. Handle Length: 520mm 5. weight: 12.5kg Octagon Mining Machinery Co., Ltd. mainly produces monomer hydraulic strut, U-shaped Karan, card view, π-beams, metal roof beams, hinged roof beams, hydraulic prop control, lift column Phone: 0537-2164096 Fax: 0537-2280553 Mobile: 13295479531 Manager: Chen QQ: 2462697944