Yog tias koj muaj lus nug txog cov lus hais los yog kev koom tes, thov koj xa email rau peb ntawm info@rubberchemical.cn lossis siv daim ntawv nug nram no. Peb tus neeg sawv cev muag muag yuav tiv tauj koj tsis pub dhau 24 teev. Ua tsaug rau koj kev txaus siab rau peb cov khoom.