... as follow:1.In closing state, when handcart in working or isolated position, and with handle operating, the ... position, when push the handart with handle to working position, during the way, can’t carry on ... S9 gets 5 pairs NO contact to make signal of working position.When handcart is in isolated position,S9 ... getting into cabinet, as long as handcart is not in isolated position, it can’t draw out ...