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1972年10月到1973年3月,本协作组收治肺心病患者247例,现分析如下:请下载后查看，本文暂不支持在线获取查看简介。
From October 1972 to March 1973, 247 cases of patients with pulmonary heart disease were admitted to this collaborative group. The analysis is as follows: Please view after downloading, and this article does not support the online introduction.