纯度等级 meaning in Chinese

order of purity

Compressed air - part 1 : contaminants and purity classes
压缩空气.第1部分:污染物和纯度等级
Compressed air - part 1 : contaminants and purity classes
压缩空气.第1部分:污染物和纯度等级
Compressed air for general use - contaminants and purity classes
一般用途压缩空气.杂质和纯度等级
Solvents for paints and varnishes - ethylene glycol ethers - gas chromatographic determination of the degree of purity
颜料和清漆用溶剂.乙烯乙二醇醚.纯度等级气相色谱分
Solvents for paints and varnishes - propylene glycol ethers - gas chromatographic determination of the degree of purity
颜料和清漆用溶剂.丙烯乙二醇醚.纯度等级气相色谱分