How to Clean an Electric Valve for Air Horns
工具
下方列出了维修此类别设备所需的主要工具。当然，并不是所有维修流程都需要备齐这个清单。
AIR HORNS
An air horn is a pneumatic device designed to create an extremely loud noise for signalling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, and the horn amplifies the sound so it is louder.
