Dhina Mobile Dommunications Dorporation DMDD 中国移动通讯集团公司
Dhellona Mobile Dommunications Dorporation DMDD 移动通信集团公司
Continuous Mills Dual Motor Differential Drive (DMDD) Speed Control System is a newly developed em, in which both electric and mechanic methods are used.
双机联合拖动差动调速连轧机调速系统，是一种电气和机械方法并用的新型调速系统。
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