wo guo gong ye fang chen ji shu mian lin de xin ke ti
Yan Xing zhong ~* Tech. Advisor;Safety Enviromental Protection Research Institute;MMI. Expert of Dust Control Engineering Tech. Senior Engineer . Standing Member;Boad of Directors of CSSTLP
shi lun gong ye qi ye an quan guan li
Wang Peihe~* The Labour Safety Department;Ministry of Chemical Industry *Vice Director of Labour Dept;MCI. Senior Economist.