In the production of PVC resin by calcium carbide-acetylene process,how to treat the large amount of carbide slag slurry is a matter of great urgency.是什么意思_In the production of PVC resin by calcium carbide-acetylene process,how to treat the large amount of carbide slag slurry is a matter of great urgency.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句