Ethylene propylene random copolymer(PP-R)is a thermoplastic with many desirable properties including low cost,good processability and balanced mechanical properties.是什么意思_Ethylene propylene random copolymer(PP-R)is a thermoplastic with many desirable properties including low cost,good processability and balanced mechanical properties.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句