Relfn.雷尔夫RELabbr.能量损失率（=rate of energy loss ）relocatable mode浮动方式relocatable area可浮动区,可再定位区relocatable file浮动文件reliability life空心等厚圆盘relromolar space磨牙后间隙relieving amount让刀量relocatable term可再定位项,可浮动项,浮动项,可重定位项relfection error反射误差reluetance motor磁阻电动机religrous policy宗教政策