Pipeline tracing line, also known as pipeline marking line or pipeline tracing strip, is a facility used to identify the locations of underground pipelines. It can inform people of the existence and type of underground pipelines in the area through different colors and patterns, such as water pipelines, natural gas pipelines, power lines, etc. Its main functions include the following:

1.警示：管道示踪线为人们提供了管道位置的具体信息，可以帮助人们避免在施工、挖掘或其他地下工作中对管道造成损坏和危险。通过准确标示管道位置，可以地避免人为因素导致的事故和事故的危害程度。

1. Safety warning: Pipeline tracing lines provide specific information about the locations of pipelines, which can help people avoid damage and danger to pipelines during construction, excavation, or other underground work. By accurately marking the position of pipelines, accidents caused by human factors and the degree of harm caused by accidents can be avoided to the greatest extent.

2.施工导引：在工程施工过程中，管道示踪线可以作为一个可视的指导，帮助工程人员清晰地了解地下管道的布局和走向。这样可以有效避免施工人员误判管道位置，从而减少施工错误和重新修复的成本。

2. Construction guidance: During the construction process, pipeline tracing lines can serve as a visual guide to help engineering personnel clearly understand the layout and direction of underground pipelines. This can effectively prevent construction personnel from misjudging the position of the pipeline, thereby reducing construction errors and the cost of repair.

3.紧急排查：当发生地下管道泄漏、爆炸等紧急情况时，管道示踪线能够为事故处理人员提供重要的参考依据。事故处理人员可以根据示踪线的标识，迅速确定地下管道的位置和类型，并进行相应的紧急处理措施，以地减少事故损失。

3. Emergency investigation: In case of emergency situations such as underground pipeline leakage or explosion, pipeline tracing lines can provide important reference basis for accident handling personnel. Accident handling personnel can quickly determine the locations and type of underground pipelines based on the identification of trace lines, and take corresponding emergency measures to minimize accident losses.

总之，管道示踪线起到了提醒、警示和引导作用，为我们提供了对地下管道布局的直观认知，从而保障了人们的生命和财产。

In short, pipeline tracing lines serve as reminders, warnings, and guidance, providing us with a visual understanding of the layout of underground pipelines, thereby ensuring people's life and property safety.