国内外小井眼井钻采技术的发展现状钻用钻井机钻(矿井)
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In drilling an oil well, mud is used to lubricate the cutting bit. To bore ( a shaft) with a trepan.
钻油井时,泥浆被用来润滑钻头。钻用钻井机钻(矿井)
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Control method of welding deformation in derrick welding process of work ocerring and trepan
修井机和钻机井架焊接变形的控制方法
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Evaluation of anterior cervical decompression with trepan and fusion of BAK implantation
颈前路环锯减压BAK植入融合术式评价
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目的探讨前路环据法椎管扩大减压术治疗脊髓型颈椎病的疗效。
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