“countersink”的概念、定义、翻译、参考文献-科学参考

单词	countersink
释义	countersink [`kau̇nt·ǝr´siŋk] ^{DESIGN ENGINEERING} The tapered and relieved cutting portion in a twist drill, situated between the pilot drill and the body.
随便看	SS SS 433 SSB SS Cygni stars SSD SSI ss loran SSM SSP SSR SST S star s-state SSTV SSU St stab stab culture stabilator stability stability augmentation system stability augmentors stability chart stability constant stability criterion

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