STAS 11771/6-1984
礦物和煤加工造成潛在污染的天然放射性核素.礦山采掘業中巖石、礦物、粉末和次要材料中氡222含量的測定
NATURAL RADIOACTIVE NUCLIDES WITH POLLUTION POTENTIAL PROCEEDED FROM ORES AND COALS 222 radon specifical emanation determination of rocks, ores, powders and secondary materials of extractive mining industry