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For anastomosis of various cavities, two rows of circular cross-stitched staples can be driven into the cavity tissue to sew the two layers of cavity tissue together. The built-in circular knife cuts off excess tissue to form a circular anastomosis .At present, it is mainly used for end-to-end anastomosis and end-to-side anastomosis of the digestive tract such as esophagus, stomach and intestine.