宇环数控：为iPhone 17系列提供外观部件材料的磨削和减薄加工服务

Group 1 - The company, Yuhuan CNC (002903), has been providing services to the Apple supply chain since the iPhone 4, receiving high recognition for its products and services [1] - The company offers grinding and thinning processing services for exterior component materials related to the iPhone 17 series and other products [1]