https://youtu.be/mTjZEnChcKU

The time it takes to respond to a fire may vary depending on the speed of fire spread and the risk factors of the environment, but in general, it is considered critical to intervene in the fire at the very beginning. The fire can remain at a controllable level and be extinguished before it spreads. Ensuring the fire safety of cable tunnels is always critically important for facilities to return to production in a short time.