Dewatering is always necessary in foundation pit excavation and hand dig piles.
基坑开挖或施行人工挖孔桩常常需要进行人工降水。
People used simple tools to dig the canal, completely by hand.
人们使用简单工具来挖这条水渠,纯粹靠手完工。
Ask employees to dig through their desks, briefcases and pencil jars to use what they have on hand.
让员工从办公桌、文件夹、和笔筒里寻找手头使用的办公用品。
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