日本少妇激情视频-欧美肥胖老妇bbw-色亚洲欧美-在线日韩一区二区-97少妇-国产福利小视频-亚洲自拍一区在线观看-午夜一区-成人免费视频a-亚洲永久视频-奇米影视在线观看-在线黄色大片-九九热在线视频-美国成人免费视频-理论在线视频-狠狠干中文字幕

In the 1990s, Fengchi created the built-in roll molder for the first time, which completely subverted the traditional steel wheel molding technology, simplified three steps into one of the molding process. And we solved the problem of diameter axial runout of steel wheels (within 0.6mm), and the rims were free from damage, crack, fracture and obvious deformation, and the vacuum tire has no chronic air leakage after the fatigue test and the radial impact test. So, “a device with a set of mould” largely increased the sample development efficiency, and reduces the cost of manufacturing products.