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direct plummet observation
meaning in English
正锤[线]观测
正垂线法
Related Words
plummet
plummeting
plummet level
plummet fall
laser plummet
plummet line
sounding plummet
plummet body
plummet method
plummet wire
direct plug connector
direct plumb line hole
direct plunger elevator
direct plunger lift elevator
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