Inserting the AC supply lead into the unit automatically disconnects the batteries. 交流电源导线连接本机时，机内干电池即自动切断。
Installation of automatic block valves with limit switches on each stream entering or leaving the compressor sections is foreseen. 应预先在压缩机的入口和出口物流管线上安装带有限位开关的自动切断阀。
