Methods Descriptive time of exposure to vibration and rates of symptoms in hands and general symptoms of 254 vibration workers, and corn-paring with 28. nonvibration workers groups.

方法记录254名从事振动作业的工人的接振时间和手部症状及一般症状的发生率，并和28名同一作业环境下非接振作业工人组成的对照组比较分析。

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Methods Descriptive time of exposure to vibration and rates of symptoms in hands and general symptoms of 254 vibration workers, and corn-paring with 28. nonvibration workers groups.

方法记录254名从事振动作业的工人的接振时间和手部症状及一般症状的发生率，并和28名同一作业环境下非接振作业工人组成的对照组比较分析。

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