Kuyambira Novembala 15 mpaka 17, kope la 23 la IE expo Guangzhou lidachitika bwino ku China. Kusindikiza kwa IE expo kudakopa mabizinesi 437 ndi alendo 18,155 amalonda kuti atenge nawo gawo mu ...
Mu February 2022, kuyesa kuyerekezera mtengo kwa "fust particle counter" kunachitika ku China. Ntchitoyi idakonzedwa ndi China Environmental stoichiometry Technical Committee ndi Shanghai Insti ...