... ,hign efficiency 4.time and money saving Automatically film blown machine Features:1, screw extruder, spiral tube-based company2, by ... 8 times longer, not only to make up for a quick network device for easy leak material defects, can effectively extend ... . 5, traction roller, roller coiling Balancing all of detection, correction, precision grinding. 6, on the use of short-chain rotational traction ...