... material, such as textiles, leather, polyethylene, synthesis, etc.Suitable for sewing bags, sails, tents, bag, coats, leather products, etc.Feature 2*Connecting ... lubrication big hook, and greatly improve the synchronous feeding material sewing thick the work efficiency.*Stitch plates of the standard locking ... 72Lubrication methodsManual note shaft Big hook cylinder unison feed sewing machine GC1-341