This standard specifies the basic composition, main technical conditions, test methods and acceptance rules of instruments used fo

This standard specifies the determination of total calcium and magnesium hardness in water by complexometric titration with disodi

This standard specifies the content, inspection methods and judgment criteria of underground industrial tests for fully-mechanized

This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transporta

This standard specifies the type and parameters, technical requirements, test methods, inspection rules, marking, packaging, trans

This standard specifies the product classification, technical requirements, test methods, inspection rules, etc. of electronic pro

This standard specifies the classification of coal according to the range of germanium content (Ged) on a dry basis and its nomenc

This standard specifies the classification of coal according to the range of fluorine content (Fa) on a dry basis and its nomencla