Where mechanical digging equipment is used,an undocumented or misaligned utility line can be easily be damaged if it is not observed by the excavation workers. Gas and electricity lines present very obvious safety threats in this situation.是什么意思

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1)Where mechanical digging equipment is used,an undocumented or misaligned utility line can be easily be damaged if it is not observed by the excavation workers. Gas and electricity lines present very obvious safety threats in this situation.,原句2)There are several geophysical techniques with proven capabilities in non-intrusive subsurface investigation....,原句3)One way to verify the location of such buried objects is to cautiously dig a trial pit to expose the object in question.,同样，我们发现原句是

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Where mechanical digging equipment is used,an undocumented or misaligned utility line can be easily be damaged if it is not observed by the excavation workers. Gas and electricity lines present very obvious safety threats in this situation.是什么意思

网络释义

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