通过对流水线上操作人员在不同作业姿势下的疲劳分析，研究站姿、坐姿和站、坐交替三种姿势的疲劳时间阈值和劳动时间率。
By analyzing operator's fatigue states under different working posture on assembly line, studys the fatigue threshold and working time rate of standing posture, sitting posture and alternate posture.
本文所研究的折臂式高空作业车是在特定环境下，为适应国家重大工程项目复杂安装与操作工况而研制的专用设备。
The folding-jib overhead working truck researched in this thesis is designed for the complex setting and operating condition of our country's important project.
通过操作冲击电压的生物放电试验，研究了带电作业中屏蔽服对人体的防护效果。
Through the breakdown tests of life-form under switching impulse voltage, the protective effect of conductive clothes is studied.
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