prepare full labor, fully equipped for the workers in the labour process. for digging holes not dig too steep roof allows rules to avoid collapse pits dug. Do steps up and down the pit dug for sure. the protective fence around the peach pit, signs the area under construction. While using excavators are not allowed to do the extra work would close the cavity dug, poured Earth digging machines to automobiles to go from behind the wheel. transport land not be standing in the scope of influence of the sliding surface
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