短語(yǔ)詞組短語(yǔ)endless chain trench excavator 循環(huán)鏈?zhǔn)蕉圄a挖溝機(jī)multiple -cut trench excavator 多刃挖溝機(jī)ditch -and-trench excavator 開(kāi)渠挖溝機(jī) 返回 trench excavator