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本文对标作业工人的心血管系统情况进行了调查，现将结果报告如下。1．调查对象及方法：锰作业工人375名为接触组；550不接触锰及其它毒物且体质相近的工人为对照组。接触组年龄为20～56岁，平均工龄13．5（1～35）年；对照组年龄20～55岁。在正常安静状态下对两组人员进行血压
This article surveys the standard operating conditions of the cardiovascular system, the results are reported as follows. 1. Subjects and methods of investigation: 375 working-class manganese workers were exposed; 550 workers without physical exposure to manganese and other toxins were the control group. The contact age ranged from 20 to 56 years and the average length of service was 13.5 (1 to 35) years. The control group was 20 to 55 years old. Under normal quiet state of two groups of people for blood pressure