How do 3-D printers build up objects?
(Отметьте один правильный вариант ответа.)
Варианты ответа
They dispense a thin layer of liquid resin and then make it harden using an ultraviolet laser(Верный ответ)
They dispense cut liquid resin and then make it harden
They harden a thin layer of liquid resin
They use an ultraviolet laser to cut components