industrial sewing machine,457 zig-zag industrial sewing machine, flat bed type, cylinder bed type and post bed type zig-zag machines, high speed, 1-needle/2-needles, drop feed, lock stitch, feed off the arm, diving suits boots, sports goods, sails, tarpaulins, sports shoes, bags, fagoting zig-zag, collaretting shell pleating zig zag,