[VIP第1年] 指数:7
通过认证 and then the compressed air is imported into the sound device of the air horn through the flame retardant hose (copper plate, silica gel plate or paper plate) to make sound,
and then the sound is expanded through the loudspeaker to achieve the warning and warning effect. The electric control air horn is composed of two to four or even more horn tubes.
The air pump (brake pump or electric air pump) in the car provides air pressure. The switch of the car horn is connected with the electric control switch.
The mechanical air horn pronunciation device is the same as other air horns, but the air pump is changed from electric to manual, which is mainly suitable for football matches where fans are concentrated,
bicycles and other places lacking power supply.
