- 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; Many thanks Useful 9 Not Practical 6 If straight pins depart the patch way too wavy for easy sewing, you can staple it temporarily in place and