How to use the fire hydrant with sticker? Who stipulated it?

Outside fire hydrant box, fire regulations stipulate. According to the relevant requirements of fire laws and regulations, fire-fighting facilities and fire-fighting equipment in buildings such as fire hydrants should be prominently marked, and their usage methods should be posted. Fire hydrant signs should be posted on the outside of the fire hydrant box door, the fire hydrant signs should be posted on the top of the door, and the schematic diagram of the use of fire hydrants should be posted below. The schematic diagram can also be posted on the inside of fire hydrant box Gate. Fire hydrant is officially called fire hydrant, which is a fixed fire control facility. Its main function is to control combustible materials, isolate combustion-supporting materials and eliminate fire sources. There are indoor hydrants and outdoor hydrants.