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５０２例锰作业工人心电图分析张登学（贵州省劳动卫生职业病防治研究所）报道：电焊工５０２人（男性占７７．８９％），平均作业工龄１２．８８年，平均年龄３１．２８岁。对照组１５４人，平均工龄１６．５６年，平均年龄３７．１７岁。均排除心脏疾患。心电图的描记分...
Electrocardiographic Analysis of 502 Manganese Workers Zhang Dengxue (Guizhou Institute of Occupational Health and Occupational Disease Prevention) reported that 502 welders (77.89% of men) average working age of 12.88 years, with an average age of 31.28 years. The control group of 154 people, the average length of service 16.56 years, with an average age of 37.17 years old. All exclude heart disease. ECG points ...