- 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;Seal your thread by using a knot or about the machine. Once you’ve produced it each of the way round the patch, finish the sew by using a hand knot or by again-monitoring about the machine.I am Heather, an outgoi