英语词汇“arch head”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	arch head
释义	WordReference Random House Unabridged Dictionary of American English © 2024 arch′ head′, [Mach.] Mechanical Engineeringa vertical, arc-shaped member fixed to the end of a walking beam, for supporting a chain from which a pump rod or the like is suspended in such a way as to let it rise and fall vertically.
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