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单词
safety ladder, emergency ladder
释义
safety ladder, emergency ladder
安全梯; 立井凿井时,悬吊于井筒工作面上方,供紧急情况下人员安全升井的金属梯。
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searced
searcer
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search ads
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search aided radar transponder
search airship
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search all subdirectories
search along coast
search-and-capture
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search and clear operation
search and control antenna system
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更新时间:2026/6/18 2:16:09