英语词汇“safety counterweight”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	safety counterweight
释义	safety counterweight safety counterweight A mechanical device attached to an elevator-car frame to stop and hold the car (or its counterweight) in case of a predetermined overspeed, free fall, or a slackening of the hoisting cables.
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