This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of linear lock stitch sewing machine heads. This standard applies to household sewing machine heads (hereinafter referred to as "machine heads") that form straight seams and lock stitches.
QB/T 2043-1994 history
2011QB/T 2043-2011 Household sewing machine.Straight lock stitch sewing machine head
1995QB/T 2043-1994 Household Sewing Machine Straight Line Lock Stitch Sewing Machine Head