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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；
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A non-public document reveals that science may not be prioritized on next Mars mission
· 王芳 · 来源：dev资讯