Ditching includes all excavation work required to provide a ditch of the specified dimensions and depth of pipe cover.

挖沟指为提供规定尺寸和管子埋设深度的管沟所需的全部挖土工作。

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Ditching includes all excavation work required to provide a ditch of the specified dimensions and depth of pipe cover.

挖沟指为提供规定尺寸和管子埋设深度的管沟所需的全部挖土工作。

youdao