If your design has any neckline or centre entrance facings, these should be sewn in position before you connect the collar, as when the collar is ‘closed’ it is going to enclose the seam allowance of your garment and facings for a tidy complete.là ??n v? chuyên cung c?p d?ch v? quan tr?c môi tr??ng lao ??ng, h? s? v? sinh môi tr??ng lao the