Interlocking StructureThree Side Seal, Stand-up Pouch 4lane, Accumulator SystemBag Making Machine.3wdotjudingjixiedotcome.Machine Wall boardis interlocking structure, all spare parts are black phosphating special treatment, the structure is good for high-speed working, stable working, high-pressure, longer service life; machine cover is stainless steel #304, easy cleaning and nice looking.Three Side Seal, Stand-up Pouch.