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Product: The Hydraulic rock jack  Specification： QL-D Price: Bargain  Delivery Period: Shipped within days from the date of payment of the buyers. Last Updated: 17 Sep,2012   Valid Until： Long-term effective

The Hydraulic rock jack is especially developed for mining rock.It is widely used to move big rock block,which simplifies the way of mining rock.It adopts advanced design which has two oil rotate circuit with one electric motor.With hand control valve, th