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动土作业
挖土、打桩、钻探、坑探、地锚入土深度0.5米以上,使用推土机、压路机等施工机械进行填土或平整场地等可能对地下隐蔽设施产生影响的作业。
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trademark registration files of the Trademark Office of Nanjing National Government
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