1. Cov tswvyim sib txawv
Armor kab: Nws yog ntsia los ntawm cov khoom siv sib txawv hauv lub tes tsho hlau nrog cov ntaub ntawv insulating, thiab yog ua tiav rau hauv ib qho kev khoov khoom ua ke.
Tsis muaj armor cable: cables tsis muaj armor tiv thaiv txheej, los ntawm ob peb los yog ob peb txheej ntawm cov xov hlau nyob rau hauv txhua pab pawg ntawm tsawg kawg yog ob tug twisted cables, txhua txheej ntawm cov xov hlau insulated, feem ntau nyob ib puag ncig ib qho chaw Twisted. Tag nrho cov khob cij sab nrauv muaj cov txheej txheem insulated heev.
