The experimant resuit found that beth copmosition 50/50 PBT/PET copolyester and 50/50 PBT/PET polymer blend have the smallest n and E.是什么意思_The experimant resuit found that beth copmosition 50/50 PBT/PET copolyester and 50/50 PBT/PET polymer blend have the smallest n and E.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句