英语词汇“root pass”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	root pass
释义	root pass root pass [′rüt ‚pas] (metallurgy) The first weld bead deposited in a multiple pass weld. Also known as root sealer bead.
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