阀门排气口密封区域也是平的。

The valve outlet sealing area is also flat.

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排气口密封是许多阀门排气口的重要零件。

Outlet seals are an important part of many valve outlets.

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钢瓶返还给供应商时，正确关闭钢瓶阀门，替换并固定阀门排气口密封，正确安装钢瓶帽。

When returning cylinders to the supplier, properly close the cylinder valve, replace and secure any valve outlet seals, and properly install the cylinder cap.

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