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He has made a study on depth effect of pile foundation.
他对桩基深度效应进行了探讨。
youdao
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What is the effect of head position changes on the depth of an endotracheal tube?
头部位置的变化对气管内插管深度有何影响？请详细描述。
youdao
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What is the effect of head position changes on the depth of an endotracheal tube?
头部位置的变化对气管内插管深度有何影响？请详细描述。
youdao