Light-on
2014-04-29 00:00:00
科學(xué)大眾(中學(xué)) 2014年8期
（會吹泡泡的燈泡）
Light-on is equipped with a replaceable inflatable elastic material， which can use wasted heat to heat the air inside of material， so that it expands slowly.
The Pen Printer
（簽字筆打印機）
Abandoned pens and other such stationery stand a chance at purposeful usage， thanks to the Pen Printer. The device uses the ink from discarded pens to print on paper.
