Most of these rolling mill production lines are general constructed by MCC20 Mechanical Installation Company, some of them is subcontracted and some of them is participated.是什么意思_Most of these rolling mill production lines are general constructed by MCC20 Mechanical Installation Company, some of them is subcontracted and some of them is participated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句