Bumper is a device that absorbs and relaxes the external impact force and generates buffer when the vehicle or driver is under impact, thus playing a role in protecting people and vehicles. In addition to maintaining the original protection function, the front and rear bumpers of vehicles also pursue harmony and unity with the vehicle body shape, and pursue their own lightweight. Bumpers are generally made of glass fiber reinforced plastic and some of them are made of iron.Applicable to XCM...