Pipeline tracing line, also known as pipeline marking line or pipeline tracing strip, is a facility used to identify the location 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：管道示蹤線為人們提供了管道位置的具體信息，可以幫助人們避免在施工、挖掘或其他地下工作中對管道造成損壞和危險。通過準確標示管道位置，可以地避免人為因素導致的事故和事故的危害程度。

1. Safety warning: Pipeline tracing lines provide specific information about the location 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.施工導引：在工程施工過程中，管道示蹤線可以作為一個可視的指導，幫助工程人員清晰地了解地下管道的布局和走向。這樣可以有效避免施工人員誤判管道位置，從而減少施工錯誤和重新修復的成本。

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.緊急排查：當發生地下管道泄漏、爆炸等緊急情況時，管道示蹤線能夠為事故處理人員提供重要的參考依據。事故處理人員可以根據示蹤線的標識，迅速確定地下管道的位置和類型，并進行相應的緊急處理措施，以地減少事故損失。

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 location and type of underground pipelines based on the identification of trace lines, and take corresponding emergency measures to minimize accident losses.

總之，管道示蹤線起到了提醒、警示和引導作用，為我們提供了對地下管道布局的直觀認知，從而保障了人們的生命和財產。

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.