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This machine is specially used for processing the inner and outer mesh circles of large air filters. It is mainly used for the support frame of filters such as industrial filtration, air filters, and engineering machinery. It uses pneumatic circular blades to track and cut, and the inside and outside of the bite are smooth. It is suitable for fingerprint-resistant plates and hot-dip galvanized plates.https://fupeimanuf.com/products/filter-machine/rolling-machine/air-filter-support-expanded-metal-spiral-tube.html