pipe laying

  • un.管道铺设;埋管;管道安装
  • 网络输油管线;装管工程;敷设管道

pipe layingpipe laying

pipe laying

un.

1.管道铺设

2.埋管

3.管道安装

16
Using Gas Drainage Technology of Waste Pipe Laying to Dispose Gas for Return Air Corner in Coal Mining Face

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