Prev이전 문서
Next다음 문서
« Prev Nine Things That Your Parent Teach You A…
5 Killer Quora Answers On Mesothelioma A…Next »
abcXYZ, 세종대왕,1234
A treadmill is a walking surface that is powered by mechanical energy. If the treadmill is powered by an electric motor, it has to be connected to an electrical outlet in order to run.
