Iron can be magnetized by passing an electric current round it.让电流通过铁能使铁磁化.Each bobble is magnetized in one direction or the other.每个磁泡可以按不同方向磁化.The ferrofluid can be magnetized to the saturated state in presence of an e...
A ratchet mechanism transfers the thread from spool to bobbin.一种棘齿装置把线从线轴转到梭心上。On dictation equipment, a spool on which magnetic tape is wound.在口述记录设备上, 一种卷绕磁带的轴.a spool of cotton一轴棉线a spool of thread一轴线...