Muab cov khoom siv hluav taws xob hluav taws xob ntsuab ntsuab thiab cov kev pabcuam daws teebmeem rau hluav taws xob, kev tsim kho thiab kev tsim vaj tsev, metallurgy, petrochemical, machinery manufacturing thiab lwm yam lag luam.
Muab cov khoom siv hluav taws xob hluav taws xob ntsuab ntsuab thiab cov kev pabcuam daws teebmeem rau hluav taws xob, kev tsim kho thiab kev tsim vaj tsev, metallurgy, petrochemical, machinery manufacturing thiab lwm yam lag luam.