... ,prevent O2 ,oil proof.OPTIONAL EQUIPMENT 1. AUTO LIADER2. CORONA3. AIR COMPRESSOR4. AIR COOLING DEVICE5 ... making machine, paper bag making machine, non-woven bag making machine, rotograuver printing machine, flexographic printing machine, slitting machine, cross cutting machine, stretch film making machine, bubble film making machine, coating machine, laminating machine, plastic recycling machine ...