Kev lag luam kiv cua feem ntau bearing hom:

22310CA, 22313CA, 22316CA, 22318CA, 22320CA, 22324CA,

22326CA, 21309CA, 21310CA, 21315CA, 21316CA, 22222CA,

22224CA,22209CA,21310CA,21316CA......

6307,6308,6309,6310,6312,6316,6319,6320....

Kev lag luam kiv cua yog dav siv nyob rau hauv ntau hom factories, mines, tunnels, ships thiab lub tsev qhov cua;industrial furnaces;khoom siv cua;nplej ziab thiab lwm yam lag luam thiab teb