This is the 5777th most frequent Russian word.
противопожарный
Fireproof or fire prevention.
In this sentence, 'противопожарный' is used as an adjective to describe the word 'план', indicating the plan is designed to counteract or prevent fires.
В каждом здании должен быть противопожарный план.
Every building must have a fire-safety plan.
Here, 'противопожарное' modifies 'оборудование', signifying that the equipment pertains to fire prevention or extinguishing.
Противопожарное оборудование нужно регулярно проверять.
Firefighting equipment needs to be checked regularly.
In this example, 'противопожарные' describes 'двери', suggesting the doors are designed to provide protection during a fire.