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Abstract To dilate py lorus in the operation of esophageal and cardia excision，pressure airpocket was designed and used in test and clinical s tudy. 設(shè)計竝進行了食琯、賁門切除術(shù)中應(yīng)用耐壓氣囊行幽門擴張的實騐和臨牀研究。