... drainage trenching 挖排水沟 rock trenching 挖岩石管沟 trenching chain 挖沟切土链 ...
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In pipeline construction, traditional explosive trenching method has been applied in stonework section. Caterpillar rock trencher will play an important role in practical pipeline laying process.
在管道施工建设中，对石方段的管沟开挖一直采用传统的爆破成沟的施工方法，而履带式岩石开沟机在管道敷设的实际应用中可以发挥重要作用。
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