求翻译：基础施工时，事先做好地下管线的调查，确定其位置深度，防止施工时将其损坏。钻孔桩施工时，先开挖探测，确定无地下管线后再进行钻孔施工。是什么意思？

Foundation construction, well in advance of underground pipeline survey to determine the depth of its location, construction to prevent damage. Bored pile construction, the first excavation to detect, identify and then no drilling underground pipeline construction.

When construction of basis, and do well in advance of the underground pipeline depth investigation to determine their location, to prevent damage when its construction. Bored Piles first-come-first-served basis during the construction, digging underground pipeline after detection, identification to

When foundation construction, completes the underground utilities beforehand the investigation, determined its position depth, prevents when the construction its damage.When drill hole pile construction, excavates the survey first, after determined the not underground utilities carries on the drill

Foundation construction, do a survey of underground pipeline in advance to determine its location deep to prevent construction when it is damaged. Drilled pile construction, excavation probe to determine no underground pipelines and drilling.

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