Adopt the programmable controller in the liquid Cl2 transport process by the packing Pump. Assure the security of production. Utilize the functions of select control. Have fulfilled, conveniently and securely, the soft transfer in reserve system.%采用可编程序调节器对液氯包装泵输送过程进行自动控制，保证安全生产。利用可编程序调节器的选择控制功能，方便可靠地实现备用系统的软切换。
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