The paper mainly deals with the structure and operating principle of this system.
本文主要介绍该系统的结构和工作原理。
My company operating mainly in the form of cash produced by the major steel bar.
我公司主要以现货的形式经营全国各大钢厂生产的圆钢。
My company operating mainly in the form of cash produced by the major steel bar.
我公司主要以现货的形式经营全国各大钢厂生产的圆钢。
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