parts在化学剂量中怎么理解如5-35 parts by weight of antimony pentoxide.前面涉及主要成分是100parts,“100 parts by weight of a principal constituent composed of a halogen-containing polymeric substance and polyvinyl alcohol in a wei
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parts在化学剂量中怎么理解如5-35 parts by weight of antimony pentoxide.前面涉及主要成分是100parts,“100 parts by weight of a principal constituent composed of a halogen-containing polymeric substance and polyvinyl alcohol in a wei
parts在化学剂量中怎么理解
如5-35 parts by weight of antimony pentoxide.
前面涉及主要成分是100parts,“100 parts by weight of a principal constituent composed of a halogen-containing polymeric substance and polyvinyl alcohol in a weight ratio of from80:20 to 20:80.
不太理解这些话怎么理解.怎样翻译才最好?
parts在化学剂量中怎么理解如5-35 parts by weight of antimony pentoxide.前面涉及主要成分是100parts,“100 parts by weight of a principal constituent composed of a halogen-containing polymeric substance and polyvinyl alcohol in a wei
重量份数,这个肯定有个总量的.基本等于质量分数的意思.