a knife with a replaceable blade.
带有更换刀片小刀。
a knife with a replaceable blade.
带有更换刀片小刀。
R " is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.
是取化基,如乙氧基、甲氧基及它们环氧和烷氧同系物或卤基。
the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press .
钻机切割部分;通常是尖头有螺旋状图案并且以更换,用在钻柱钻柄或钻床上。
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