单词	railroad pen
释义	railroad pen 双线笔
随便看	traction tongue traction top traction track isolator traction trafficability traction trait traction transducer traction transformator traction transformer traction transformer of locomotive Traction transformer of Scott connection Traction transformer of singlephase connection traction transformer of threephase YN traction transformer of wood bridge connection Traction Transformer Substation traction-transmitting belt traction transport traction transtormer traction tread pattern traction treatment traction tube traction-type cell traction type dynamometer traction-type dynamometer traction type of lift traction type thickener