China QL Down the Hole Rock Drill Bit Manufacturers -
QL shank down the hole rock drill bit. Product details. Down the hole(DTH) tools manufacturer KINGDRILLING supply DTH Drill Bits with QL shank type are available in a wide range of sizes and with a number of custom design features for optimum performance in a rock formation, which are designed to match all conceivable applications for water well industries, mining and construction.
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