168MM Overburden Drilling System Down The Hole Hammer Bits For Quarry Drilling
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...: Hammer DHD350 Matched casing pipe OD: 168mm MRING-XD integral multi-use ring bit feature: 1. The Symmetric components are made up of: 2. A pilot bits with large internal flushing holes and external flushing grooves 3. Symmetrical ring bit (reamer) with...
Wuhan Kingdrilling Diamond Co.,Ltd
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