Survey on 3D-printing

Dear all,         Hello, my name is Yushuo Pan and I am a student at Northeastern University. 3D printing plays a more and more important role in people's lives and I'd like to explore some situation of 3D printing now and make a analysis to future development of 3D printing. I hope you can help me to finish the survey no later than October 17, 2014. Thank you!Best wishes!Yushuo Pan