The total production capacity of ethylene-propylene rubber(EPR) in the world was about 1 228 kt/a,with the total consumption about 1 062 kt.是什么意思_The total production capacity of ethylene-propylene rubber(EPR) in the world was about 1 228 kt/a,with the total consumption about 1 062 kt.在线翻译_英语_读音_用法_例句