英语词汇“proving ring”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	proving ring
释义	proving ring proving ring [′prüv·iŋ ‚riŋ] (design engineering) A ring used for calibrating test machines; the diameter of the ring changes when a force is applied along a diameter.
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