GB/T 38409-2019皮革化学试验N-甲基吡咯烷酮(NMP)和N-乙基吡咯烷酮(NEP)的测定标准
英文:Leather—Chemical tests—Determination of N-methyl-2-pyrrolidone(NMP) and N-ethyl-2-pyrrolidone (NEP) content GB/T 3840...
英文:Leather—Chemical tests—Determination of N-methyl-2-pyrrolidone(NMP) and N-ethyl-2-pyrrolidone (NEP) content GB/T 3840...