Gas warning tapes and tracing lines are tools used for safety identification and tracing in gas pipeline systems, and their functions are as follows:

燃气警示带（Gas Warning Tape）：燃气警示带通常是一种带有鲜明颜色和可见的标志，用于覆盖在埋地燃气管道的上方。其作用是提醒人们在地下进行施工或挖掘时，该区域存在燃气管道，并提醒他们采取谨慎措施，避免对燃气管道造成损坏，从而引发事故。

Gas Warning Tape: A gas warning tape is usually a brightly colored and visible sign used to cover buried gas pipelines. Its function is to remind people of the presence of gas pipelines in the area during underground construction or excavation, and to take cautious measures to avoid damage to gas pipelines, thereby causing safety accidents.

示踪线（Tracer Wire）：示踪线是一种导电线或导线，通常埋入地下与燃气管道一同铺设。它的作用是在需要对燃气管道进行定位或追踪时，提供一条可追踪的路径。通过电流或探测设备，可以检测示踪线的位置，从而确定燃气管道的走向和位置，以便进行维护、修理或其他操作。

Tracer Wire: A tracer wire is a type of conductive wire or wire, usually buried underground and laid together with a gas pipeline. Its function is to provide a traceable path when it is necessary to locate or track gas pipelines. By using current or detection equipment, the position of the tracer line can be detected to determine the direction and position of the gas pipeline for maintenance, repair, or other operations.

这些标识和示踪工具在燃气管道系统中起到重要的作用，可以提高施工和维护过程的性，并帮助减少对燃气管道的意外损坏。在进行任何与地下施工或挖掘相关的工作时，必须注意检查和遵循相关的标志和示踪线，以保障人员和环境的。

These safety signs and tracing tools play an important role in gas pipeline systems, improving the safety of construction and maintenance processes, and helping to reduce accidental damage to gas pipelines. When carrying out any work related to underground construction or excavation, attention must be paid to checking and following relevant safety signs and tracing lines to ensure the safety of personnel and the environment.