... counterbore n 埋头孔 CBORE Counterbore 扩孔 counterbore surface 沉头孔表面 ...
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A380缩略语、词汇、术语(14) ... CBO Cycles between Overhaul 大修周期 CBORE Counterbore 埋头孔；扩孔；平头钻，镗孔 CBR California Bearing Ratio 加州轴承比 ...
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