With the earthing switch closed, insertion of the withdrawable part towards the service position must be blocked after only two clockwise turns of the crank.
如果接地开关处于合闸状态，手车向工作位置的操作必须被机械联锁锁定。
With the earthing switch closed, insertion of the withdrawable part towards the service position must be blocked after only two clockwise turns of the crank.
如果接地开关处于合闸状态，手车向工作位置的操作必须被机械联锁锁定。
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