短期内5-10年内不一定是好投资方向，和你之前的Hydrogen Fuel Cell system 一样：
政府做做R&D, 科研补贴还可以， PE 投大钱想要有多大回报，请三思~~
----- 不是你有作业要做，出来钓鱼吧 - 哈哈-------
1. Currently, 3D printing is good for for fast prototyping, saving tooling cost,
2. For serious structural parts, for high-speed rotational speed -- no commericial use.
3. Metal 3D printing has a lot of issues to solve.
What you put out as "proof" was like -- early phase work, NASA readiness level 3, 5 at best.
Spending $1B, saved $70K :-- ) and still not fully proved.
For printing kitech tools, toys, 3D printer could be perfect :), BUT too expensive to be commercial viable??
For militatry use- weapons, 3D manufacturing/printing maybe ok, because the life time is a few minutes max, and cost is not an issue -- heard about $1000 coffee mug, correct? 3D printed Mug would be very cool, indeed, 3D printer would be good for coffee cups :)
For commericial use -- like a jet engine/gas turbine power system, life requirement for system could be 40K - 80 K hours, which is continuously running (24 x 7) for 5 years-10 years; life of components would be ~ 20K hours.
You really think the current 3D printer will generate that kind of parts -- precision/tolerance, heat treatment, etc..
3D printers & raw material supplies？
“Now, in Germany, MTU Aero Engines will begin mass 3D printing nickel alloy borescope bosses for Airbus’s A320neo jetliner, as the company aims to reduce fuel consumption by 15% with new upgrades.”
“The race is on to bring industrial 3D printing into mainstream manufacturing, beginning with the aerospace sector. In the U.S., GE has launched its own mass 3D printing facility for the production of its 3D printed fuel nozzles. Now, in Germany, MTU Aero Engines will begin mass 3D printing nickel alloy borescope bosses for Airbus’s A320neo jetliner, as the company aims to reduce fuel consumption by 15% with new upgrades.”