The defects of existing granular bed dusters were analyzed and a new granular bed duster with the merits of fixed bed and moving bed was created.是什么意思_The defects of existing granular bed dusters were analyzed and a new granular bed duster with the merits of fixed bed and moving bed was created.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句