1
What is?
cars, ships, aircraft and other means of actuating the wheel traveling direction.
2
Composition
(1) the backbone, typically zinc alloy, or an aluminum alloy.
(2) the foamed material, is coated on the skeleton of the foamed material.
(3) of plastic, leather or wood, coated on the outer foam.
(4) horn switch.
(5) airbag.
