1. 9V stacked roj teeb yog siv rau hauv ntau daim ntawv thov xws li hluav taws xob ntsuas ntsuas, ntsuas kev kho mob, geology thiab mining, wireless intercoms, wireless microphones, xov tooj cua, thiab lwm yam.2. Tau kawg, rau cov khoom siv hluav taws xob tshwj xeeb, seb puas yuav siv lub roj teeb 9-volt ...
Nyeem ntxiv