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Qixuan tau koom nrog 2023 (4th) Surfactant Industry Training Course
Thaum lub sijhawm kev cob qhia peb hnub, cov kws tshaj lij los ntawm cov chaw tshawb fawb tshawb fawb, cov tsev kawm qib siab, thiab cov lag luam tau muab cov lus qhuab qhia ntawm qhov chaw, qhia txhua yam lawv ua tau, thiab ua siab ntev teb cov lus nug los ntawm cov neeg kawm.The trainees li...Nyeem ntxiv
