2inch-26 inch tricone rock bits2015-11-18 09:12:12 |
114mm" Tricone Roller bit ,TCI ,PDC bit drill bit2015-11-18 22:58:08 |
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supply api core drill bit / 6 1/8''IADC517 tci tricone rock bit2015-11-18 23:05:42 |
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