permanent lag固定延迟permanentadj.永久的；持久的n.<口> 烫发permanent-magnetic clamp永磁环permanent loop alarm relay长期环路报警继电器permanent magnetic bearing永磁轴承permanent magnet contactor永磁接触器permanent magnet framework永磁机构permanent magnet DC motors永磁直流电动机permanent magnetic beating永磁轴承permanent type hand magnet永磁型手持吸铁器Permanent Embarkation Team常驻装载组permanent magnetic circuit永磁磁路