This machine is suitable for making very thick harmonium type undersealing bag ,such as HDPE LDPE masterbatch outer bag etc This machine is suitable for making very thick harmonium type undersealing bag ,such as HDPE LDPE masterbatch outer bag etc 1,discharging:one line2.pneumatic knife drawing and pulling type bag3.electric :SCM LCD stepping motor ,PLC touch screen ,servo motor4.mechanical : ...