当YB25/YB45包装机为自动控制模式,机器运行速度可通过机器手动调速旋钮在生产条件设定的最大极限内调节。
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职工触电应立即采取的措施是()。
A. 立即切断电源,进行抢救
B. 报120与医院进行联系
C. 拉触电职工身体使之脱离电源
During the dock repair, each sea valve must be disassembled, cleaned and ground well.Before it reassemble the sealing surface between the valve and the valve seat should be checked by ()
A. chief engineer
B. surveyor
C. the engineer
D. the technique personnel of the shipyard
利用三态门可以实现数据的双向传输。
A. 正确
B. 错误