If the machine has turned over and the cabin door is jammed, use the right hand cabin window as an emergency exit. Before starting or resuming(继续) work and especially when driving backwards, check that there are no persons or obstructions in the endangered area. If necessary give warning signals. Stop work immediately if persons remain the danger zone, despite the warning. Do not stand in the articulation(连接处)area of the machine while the engine is running. Danger of squashing(挤压)! In events of emergency actuate(促使) the emergency stop switch immediately. Do not use the emergency switch as a service brake. Only restart the machine after the hazard(危险) that has led to the actuation of the emergency stop, has been eliminated. If the machine has come in contact with high-voltage power lines: do not leave the operator's stand ware others from coming too close to the machine or touching it if possible drive the machine out of the danger zone have the power shut off Operate the machine only from the operator's seat. Keep the cabin doors closed. Do not adjust the seat while driving. Which can be used as emergency exit? The right hand ______.