Applying the opposite voltage bias to widen the tunneling gap and raise the electrical resistance would reopen the switch 施加反向电压以增大穿隧间隙，提高电阻，可以重新将开关断开。
2.
Note : the change - over difference means the difference between the temperature when the switch breaks and the one when the switch resets to close 注：切换差是指开关断开时温度和开关恢复到闭合时的温度差。
