- Có t?i thi?u 02 n?m kinh nghi?m trong l?nh v?c quan tr?c môi tr??ng lao ??ng ho?c 05 n?m kinh nghi?m trong l?nh v?c y h?c d? phòng;Get started by ensuring that each of the needed sections have interfacing connected. In case your collar is usually a convertible collar which has a stand, sew the collar section very first. Then sew the stand, enc