Should your design has any neckline or centre entrance facings, these should be sewn in position before you attach the collar, as if the collar is ‘closed’ it'll enclose the seam allowance of your garment and facings to get a tidy finish.a) V?n b?n ?? ngh? công b? ?? ?i?u ki?n th?c hi?n ho?t ??ng quan tr?c môi tr??ng lao ??ng c?a t? ch?c theo