circular drainage operation
循环排水作业
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Results In this group, 37 cases were treated with duodenal circular drainage operation, and had good effect after follow-up of 1~15 years.
结果本组患者主要症状为餐后上腹胀痛和频繁呕吐。 37例采用十二指肠环形引流术后，经1～15年随访，效果良好。
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