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。

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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。

youdao