Use a clear or invisible thread to connect patches. This can make quick perform when attaching numerous patches in one sew session. b) H? s? công b? ?? ?i?u ki?n quan tr?c môi tr??ng lao ??ng theo h??ng d?n quy ??nh t?i M?u s? 02 Ph? l?c s? III ban hành kèm theo Ngh? ??n