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trench excavation
agric. 开沟
bridg.constr. 挖沟
el. 沟渠开挖
eng.geol. 开挖沟槽
hydroel.st. 挖沟工程
tech. 挖掘管沟; 挖方支撑; 开槽; 挖地槽; 刨槽; 刨沟
trench excavation: 5 phrases in 1 subject
Technology5