Thaum xaiv cov kav hlau rau roj, roj av, dej hiav txwv, lossis cov haujlwm tsim kho vaj tse, nkag siab txog qhov sib txawv ntawmAPI 2BthiabAPI 5Lcov qauv tseem ceeb heev. Txawm hais tias ob qho qauv no tau muab los ntawm American Petroleum Institute (API), lawv tau tsim los rau ntau yam kev siv thiab kev ua tau zoo.
Pawg Neeg Muaj Koob Muaj Npe
Chaw Nyob
Kangsheng kev lag luam tsim kho cheeb tsam,
Wuqing koog tsev kawm ntawv, Tianjin nroog, Suav.
Xov tooj
Cov sijhawm
Hnub Monday-Hnub Sunday: Kev Pabcuam 24-teev
Lub sijhawm tshaj tawm: Lub Rau Hli-18-2026
