... hardened gear box, low noise, "jingcheng" DM series of plastic film blow molding unit, by the extruder, single-layer blow ... in the production of LDPE agricultural plastic film , the replacement of the necessary components, but also produces HDPE, LLDPE film. The family unit ... spiral tube-based company2, by matching the high reliability of the hardened gear box, low noise, high transmission efficiency, ...