Should your style has any neckline or centre front facings, these have to be sewn in position before you attach the collar, as if the collar is ‘shut’ it's going to enclose the seam allowance of your garment and facings for your tidy finish.one. Th?c hi?n quan tr?c ??y ?? y?u t? có h?i ???c li?t kê trong H? s? v? sinh lao ??ng do c? s? lao ??