kuju wrote "
If there were 3D printers that could print any machine or object, you'd think it was something out of science fiction movies. Not so, says Lockheed Martin of California, which is trying to convince people that it can "print" a new aircraft. The main internal structure of the aircraft shown in the image above was created using a 3D printer, and the aircraft is 91 feet wide and weighs 4 tons. Although it is "printed" out, people also have to "glue" these "printed" parts. But let's think further into the future, with the development of technology, we will be able to "print" any object without the need for human or machine manufacturing. At that time, workers no longer need to worry about "sticking", just inject tons of polymer, and then through the computer can create the required objects.