The content of this standard includes: thick belts, sleeves, ropes, straps and rope sutures, a total of 17 categories and 49 standards. The standards not only specify stitch density, stitch length and stitch strength coefficient, but also specify materials, sutures and needles.
HB 5879.4-1985 history
1985HB 5879.4-1985 Parachute seam cover with crease One row of zigzag stitching