sewing machine typical: 1.long arm,double needle 2.compound feeding 3.big hook,vertical hook 4.auto-lubrication sewing machine typical :GC20606L18:1.long arm,double needle lockstich sewing machine2.compound feeding,auto-lubrication3.big hook,vertical hook4.suitable for sewing sofa,luggage,suitcases,cushion... sewing machine typical