Yam khoom tawg-pov thawj dab tsi N sawv cev

Cov “n” Hom tawg-cov khoom siv hluav taws xob hluav taws xob yog Tsim los siv rau hauv cheeb tsam 2 ntawm ib puag ncig gas-explosive.

Hom tawg pov thawj	Gas explosion-proof cim
N-type	nA,nC,nL,nR,nAc,nCc.nLc,nRc

Cov khoom siv no tuaj yeem ua ntau yam qauv thiab muaj ntau yam kev siv. Nws cov xwm txheej sib txawv tso cai rau kev siv dav hauv ib puag ncig uas muaj cov pa roj tawg, kom ntseeg tau tias muaj kev nyab xeeb thiab kev ua haujlwm.