CQL50 ( Cop54 QL50) High air pressure DTH Hammer with foot valve. Advantages: 1. Valve air distribution. More reliable. 2.Simple design of the piston, long life. 3.More efficient energy transfer, ...View More
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2 Inch to 12 Inch DTH Hammer with Foot Valve for Mining Cop54 Gold Ql50 in ASTM Standard