Are the fire hydrants on the floors of star-rated hotels sealed with seals?

Fire hydrants on the floors of star-rated hotels are sealed with seals.

1. Fire hydrant seal refers to the paper with seal on the door or appliance where the fire hydrant is placed. It is marked with a deadline and stamped with a seal.

2, in fact, there is no strict fire laws and regulations that fire hydrants must be closed, mainly to show that they are closed and to prevent unauthorized opening and use of fire hydrants.