junk bit ; milling bit
358) ==> 《将军澳水质管制区水质指针声明》(第358章) junk bit ==> 磨铣钻头 junk bond ==> 破烂债券 ..
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铣磨钻头 milling bit
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该术语通常是指钢的小碎片,如手工具、小零件、钻头喷嘴等,也可能是指钻头碎片或其它井下工具的碎片,以及磨铣作业所产生的残留物等。
The term is usually reserved for small pieces of steel such as hand tools, small parts, bit nozzles, pieces of bits or other downhole tools, and remnants of milling operations.
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