Colour can also be used to convey specific meaning such as warning (red), caution (yellow), safety (green), etc.
颜色可能并且被使用表达具体意思譬如警告(红色),小心(黄色),安全(绿色),等。
The safety identification marks for fuel gas pipeline facilities, such as mark stake, test stake, mile stake, warning board, etc. ;
标志桩、测试桩、里程桩、警示牌等燃气管道设施安全识别标志;
The safety identification marks for fuel gas pipeline facilities, such as mark stake, test stake, mile stake, warning board, etc. ;
标志桩、测试桩、里程桩、警示牌等燃气管道设施安全识别标志;
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