亚洲综合区I人人操人人看人人摸I中文字幕视频在线免费在线看二三四I樱花视频在线观看Ijizzjizz日韩I亚洲一卡二卡三卡I伊人色图I超碰97久久I健身教练巨大粗爽Gay视频I韩产一级I任你爽免费视频I中出av

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.