Dab tsi yog cov hlau siv rau tawg-pov thawj teeb

Siv cov kab hluav taws xob tawg, uas tuaj yeem ua rau muaj kev nyab xeeb, flameproof, los yog khiav los ntawm steel conduits los yog tawg-pov thawj saj zawg zog conduits.

Thov xa mus rau GB50058-92.