1. Zone 1 thiab Zone 2 qhov chaw muaj kev phom sij;
2. Class IIA, IIB, IIC explosive atmospheres;
3. Pab pawg kub: T1 ~ T6;
4. Siv rau roj av, tshuaj, aerospace, tub rog thiab lwm qhov chaw;
5. Cov khoom no tuaj yeem siv sib cais tshwj tsis yog rau lub vaj huam sib luag cable hom.Hom kev tsheb ciav hlau thiab lub vaj huam sib luag tsis tuaj yeem siv ib leeg, thiab yuav tsum tau siv ua ke nrog cov vaj tse tawg-pov thawj.