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It is used for blowing high and low pressure polyethylene, and its products are widely used for packaging of composite film, packaging film, agricultural covering film, textile, clothing bag or film, etc.; the main motor adopts frequency conversion speed regulation, which increases the stability of speed regulation of the main machine, and can save 30% power, the screw barrel adopts 38 chrome molybdenum aluminum, after nitrogen treatment, the traction frame adopts lifting type, which can make its cooling effect regardless of blowing large and small film The fruit is the best.