... PA, POM, PMMA,PE,PP,Aluminum,Copper ,Steel,etc.)3. Plastic injection and mould making (Injection Moulds/die-casting moulds) 4 ... appearance threshing process is indispensable.2. Test structure design: because plank is assembly, so it can be intuitive reflect structure reasonable ... be in the development of the mould out before use plank for product promotion, and even the sales and production preparation ...