"Los ntawm hom khoom (forged steel, cam khwb cia hlau), los ntawm daim ntawv thov (kev lag luam mining, thermal fais fab nroj tsuag, cement kev lag luam, lwm tus), los ntawm cheeb tsam (North America, Europe, Asia-Pacific, Latin America), kev ua lag luam rau kev sib tsoo tuav cuam tshuam. los ntawm COVID-19 yuav ua tiav.Analysis ntawm Tebchaws Meskas, ...
Nyeem ntxiv