To prevent misuse, and some special valve and use a special connector between cylinders.
为了防止误用，有些专用减压阀与钢瓶之间采用特殊连接口。
Quality achievement of excellence, insight, creating the future, Hongda special valve Co.
品质成就卓越，远见开创未来。
The utility model provides a double-sealed special valve for combustion gas, belonging to a special valve for the combustion gas.
本实用新型提供的双密封燃气专用阀属于一种燃气专用阀。
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