Pplication of rapid prototyping in industrial field

1. i want just about 1000 words as a main body for application of rapid prototyping general idea in industrial application which use diffrent machine suah as SLS, SLA,FDM and 3D printer, includs some pictures that show parts which prepared by these machines

2. i want this paper about applications of this technique.

3. at the end of paper you should write conclusion.

i dont need introdaction, abstract and any explain of machines
any modren sources