Lus piav qhia luv luv:

End-type series dual-power tsis siv neeg hloov pauv hloov pauv yog kev sib txuas ntawm kev hloov pauv thiab kev tswj hwm, tsis tas yuav tsum muaj kev tswj hwm ntxiv kom ua tiav kev sib koom ua ke ntawm electromechanical, nrog rau kev ua haujlwm xws li ntsuas hluav taws xob, zaus, l kev sib txuas lus, hluav taws xob, kev sib tshuam, thiab lwm yam.