서보 페이퍼 컵 기계
How do paper cups hold water?
에이 종이 컵 is a disposable cup made out of 종이 and often lined or coated with plastic or wax to prevent liquid from leaking out or soaking through the 종이. It may be made of recycled 종이 and is widely used around the world.
How do paper cups hold water?
이전: 종이 컵
