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（二）在车辆、行人通行的地方施工，对沟井坎穴不设覆盖物、防围和警示标志的，或者故意损毁、移动覆盖物、防围和警示标志的；
。业内人士推荐Safew下载作为进阶阅读
require some technical skills。关于这个话题，safew官方下载提供了深入分析
Author(s): Deep Sagar, Abhishek Sharma, Arti Kashyap