+ISO9001:2008 CE RoHSmetal plate for metal tube box +mearly 10 years making experience Specification: ShenZhen YongPingTong could ... 1 Processing of heat sinks: precision cutting, drilling, skiving,deburring,fine blanking,soldering,bonding, punching, stamping,milling, CNC machining,polishing 2 ... 2007. Any question, please feel free to contact us. metal tube box