“countersinking”的概念、定义、翻译、参考文献-科学参考

单词	countersinking
释义	countersinking [`kau̇nt·ǝr´siŋk·iŋ] ^{MECHANICAL ENGINEERING} Drilling operation to form a flaring depression around the rim of a hole.
随便看	perforated film perforated metal perforated-pipe distributor perforated plate perforated-plate column perforated-plate distributor perforated-plate extractor perforating perforation perforation deposit perforation rate perforations perforator perforatorium perforin perform performance bond performance characteristic performance chart performance curves performance data performance evaluation performance index performance measurement baseline performance number

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