... .3.Automatic checking,no pouch or pouch open error,no fill,no seal.the bag can be used again,avoid wasting packing ... is special in the feature of zipper bag,it can avoid distortion or destroy when open the zipper.10.The packing materials ... Process 1,Giving bag2,coding date3,open bag 1st (open the zipper)4,open bag 2nd (integrity open the bottom of bag)5,filling &vibrate6,sealing 1st ...