Peb Qhov Ntsuas Qhov Ntsuas thiab Nqe Logic
Cov ntsiab lus tseem ceeb hauv Refining:
Sieving: Muab qhab nia los ntawm qhov loj me kom ntseeg tau tias muaj kev sib haum xeeb;

Koj tuaj yeem tiv tauj peb ntawm xov tooj, email lossis online daim ntawv hauv qab no. Peb tus kws tshaj lij yuav tiv tauj koj sai sai.
Hu rau tam sim no!