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广东轻工业机械集团公司最新推出了一种薄膜包装机。该机采用了世界上先进的薄膜恒张力输送技术、薄膜冷切技术、伺服电机同步控制技术，是国内同类产品中规格多，性能先进的产品。该薄膜包装机可以提供三种包装形式：无纸薄膜包装、纸板薄膜包装、纸托薄膜包装。包装过程分为?
Guangdong Light Industry Machinery Group recently introduced a film packaging machine. The machine uses the world’s advanced film constant tension transmission technology, film cold cutting technology, servo motor synchronous control technology, is similar to the specifications of domestic products, advanced performance products. The film packaging machine can provide three types of packaging: paperless film packaging, cardboard packaging film, cardboard packaging film. Packaging process is divided into?