1)gas classification,气体分级法2)gas classifier,气体分级器3)Rock mass rating (RMR),岩体分级法4)gas analysis method,气体分析法5)gas chromatography,气体分色法6)gas-volumeteric method,气体体积分析法
用法例句
In this paper,we use the maximum absorbance of 3,5-Diacetyl-1,4-dihydro-2,6-dimethylpyri-dine in 412 nm,exert the good characteristic of Hantzsch reaction with formaldehyde,take the gas analysis method to determine the degree of formaldehyde pollution.