1. Query key: query the key on the fire engine. Letters or numbers will be marked on the key panel, and you can query the fire control host through key symbols.
2. Description: Inquire about the description of the fire engine, which will be marked with the operating instructions. You can inquire about the fire engine through the operating instructions.
3. Production: Ask the manufacturer of the fire main engine, and the manufacturer will provide the corresponding operation guide. By querying the manufacturer, you can query the fire control host.