海词手机词典

Pyrolysis gas chromatography (PGC) was introduced to analyze the composition of ethylene propylene copolymer.Blends of different proportions were used for calibrating the composition of the copolymer.

播放读音 播放读音

以上内容独家创作,受著作权保护,侵权必究

海词词典,十七年品牌