Aphaj zoo li cov cuab yeej txuas uas txuas ntau cov hlua insulator lossis assembleraws li tus naj npawb ntawm cov ceg nyuab siab rau hauv tag nrho.
Ib lub voj voog hlau siv rau kev sib txuas insulated overhangs
feem ntau yog siv rau hauv cov khoom siv hluav taws xob
Hanging phaj rau traction txuas nrog nro-resistant insulator hlua ntawm ultra high voltage overhead fais fab kab
siv los zawm cov hlau hlau thiab kho qhov nruj