TS 2299-1976 DRILLING EQUIPMENT - DIAMOND DRILLING BITS AND DIAMOND CORE BITS SIZES AND TOLERANCES《钻井设备 金刚石钻头及金刚石取芯钻头 尺寸和公差》.pdf

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SY T 5217-2000 金刚石钻头及金刚石取心钻头.pdf

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