trenching造句

1、Therefore, in the milling back trenching session should note the following points.
因此，在铣背拉槽环节中应注意以下几点。

2、It established the theoretical base for the design of trenching implement.
为挖沟器的设计奠定了理论依据。

3、A large number of leak: to build a causeway or trenching asylum.
大量泄漏：构筑围堤或挖坑收容。

4、Various trenching methods and pipe geometries are used.
各种方法和管道几何挖沟使用。

trenching翻译