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1·Never permit oil, grease, or other readily combustible substances to come in contact with cylinders or valves.

禁止油、润滑脂或其它容易燃烧的物质接触到钢瓶或阀门。

2·Permit oil, grease, or other readily combustible substances to come in contact with cylinders, valves, or other equipment in oxidizer service.

让油、润滑脂或其它易燃物质接触钢瓶、阀门或正在使用氧化物的设备。