Prior to construction, delineate and mark all property boundaries and underground utilities.
在建造之前，画出并标出所有的财产边界和地下设备。
Also when digging operations have potential to strike underground pipelines or utilities.
挖掘作业可能损坏地下管道或公用设施。
Also when digging operations have potential to strike underground pipelines or utilities.
挖掘作业可能损坏地下管道或公用设施。
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