提出一种新颖的双降压式交流斩波器.A novel bi - directional dual Buck AC chopper is presented in this paper.因此, 内反馈斩波调速装置是风机水泵调速节能的首选设备.Finally, the internal feedback chopper regulator is the preferred equipment of fan and water pump regu...
在孤注一掷地闪电战中他猛冲过外国领地.He careened through foreign territories on a desperate kind of blitz.虽然他的行动在当时看来就像一场闪电战, 但他后来却后悔自己没能更快.And though he acted with what seemed at the time like blitzkrieg aggressiveness , he regretted in ...