trench cutting
... trench crossing 掘沟穿越 trench cutting 开管沟 trench drain 排水沟 ...
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开沟铺管机 Trencher and pipe layer
·2,447,543篇论文数据，部分数据来源于NoteExpress
在试图用撬杠打开管道沟的盖板几次不成功后，他们打电话召来了叉车。
After several attempts to lift the cover with a pry bar were unsuccessful, a call went out to get a forklift.
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