22 inch tricone drill bit, 22 inch tricone drill bit ...
12 inch tricone drill bit 1,Standard : API & ISO 2,Datas Size 98mm- 660mm Bearing type rubber and metal sealed bearing type IADC code 117, 127,217, 417,437,517,537,617,637 A pplication Extremely soft ground to hard formations such as clay, mud stone, chalk, gypsum, rock salt, shale, limestone, sandstone, dolomite, marble and other hard sandwich complex formatio 3,Bit Pics Packaging & …
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