pipe laying works
管道敷设工程 ducting works ; pipe laying works
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黑河是西部管道工程采用大开挖方式穿越的距离最长的河流， 原油与成品油管道采用同沟敷设方式穿越该河流。
West Pipeline crossing Heihe River is the longest crossing project by a large excavation way and the method of laying both crude oil pipeline and products pipeline in a single trench.
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