If your structure has any neckline or centre front facings, these must be sewn in place before you connect the collar, as if the collar is ‘closed’ it can enclose the seam allowance in the garment and facings for a tidy end.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 theo ngh? ??nh forty fou