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在职业危害作业场所的天车，一般离地面６ｍ左右，本身不产生有害因素，但司机却被动接触着天车下作业场所产生的有害因素。为了解职业危害作业场所天车的接触水平，１９９３年以来，我们对３６个厂职业危害作业场所的天车司机进行了调查。现报告如下。对象与方法 （１）对象
Crane occupational hazards in the workplace, generally about 6m from the ground itself does not produce harmful factors, but the driver is passive contact with the crane under the workplace harmful factors. In order to understand the occupational hazard level of crane contact at the workplace, since 1993, we conducted a survey on crane operators at 36 occupational hazards sites. The report is as follows. Objects and Methods (1) Objects