◉ Dab tsi yog cable ntaiv? Cable ladder yog cov txheej txheem nruj uas muaj cov ntu ncaj nraim, khoov, cov khoom siv, nrog rau kev txhawb nqa caj npab (pob caj npab), hangers, thiab lwm yam ntawm cov tais lossis cov ntaiv uas nruj txhawb nqa cables. ◉ Yog vim li cas rau xaiv ib tug cable ladder: 1) Cable tais, trunking, thiab th...
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