(extra) Will 3D printing change the world? / Yerim Han

 I think 3D printing will change the world.  Of course, it won't just change to the good side as it has both merits and demerits. First of all, the big issue in commercializing after successful 3D printing is "gun." If you have a drawing, it will print out all the functions, just like copying and pasting the object. Therefore, the gun can be manufactured at any time with only a drawing. It is fatal in South Korea, where firearms are banned. On the contrary, we can use this to help disabled people live by making their prosthetic legs cheaper. Before 3D printing becomes more commercialized, it is necessary to set up a manual for it.

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