Closed-loop double pipe direct return system 闭式双管异程系统
direct feeding system 直接供电方式
direct return system 异程式系统
direct return system DRS 异程系统
direct-feeding system 直供供电方式
two pipe direct return system 双管直接回水供暖系统
digital wire feeding system 数字化送丝机
Wire feeding system 送丝系统
wire-feeding system 送丝系统
AC three phase four wire system with neutral earthed 中性点接地的交流三相四线系统
AC three phase three wire system with earthed hull as neutral wire 利用船体作为中性线回路的交流三相三线系统
alternating current three phase four wire system with neutral earthed 中性点接地的交流三相四线系统
alternating current three phase three wire system with earthed hull as neutral wire 利用船体作为中性线回路的交流三相三线系统
dust density region return system with primary wind 密相返料
AC electrification railway with direct power supply system 直供方式交流电气化铁道
activating tungsten inert-gas welding with direct current straight polarity mode 直流正接A-TIG焊
copper loss with direct current 直镰损
direct current two- wire system 直流二线式
direct feeding 直接入料; 直接供电