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介绍了一种气体浓度自动控制装置的组成、工作原理和提高可靠性所采取的措施。装置具有电路简单、被控制参数调节范围广、工作稳定可靠和使用方便等特点。装置投入使用后，收到了明显的经济效益。
Introduced a gas concentration automatic control device composition, working principle and measures to improve reliability. The device has the advantages of simple circuit, wide adjustment range of controlled parameters, stable and reliable operation, convenient use and the like. After the device put into use, it has received obvious economic benefits.