- 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;Manufactured from blue wool with white, pink, or buff facings, the frock coat became the normal uniform for American officers by the end of the war. The coats frequently showcased elaborate gold or silver lace, epa