Beth, this is a very interesting approach. By replacing the print head with the cartfidge each time you essentially get a new print module. This should make it more eaisly maintainable. With this price point, it is going to get into more people's hands. Out school district recently bought a 3D printer and spent $35K. This would have been nice.
NASA and Boeing developed a huge, carbon composite cryogenic fuel tank for deep space missions, and started testing it last month. The 18-ft cryotank will enable heavy-lift launch vehicles to send both humans and robots into deep space.
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