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《煤炭资源地质勘探规范《有关视比重(由于容重测定方法的国家标准中采用“视比重”一词,下面都用视比重代替容重)方面只规定:“有条件的勘探区(井田)利用坑探或井
The relevant aspect of the “Code for Geological Prospecting of Coal Resources” (as the “apparent gravity” is adopted in the national standard for the determination of bulk density) Exploration or well