Physics:What's That About — Spring Cleaning
Every year we track 42 pounds of dirt and dust into our homes. And getting rid of it eats into our weekends. So today we find ways to lessen the burden. Imagine a vacuum that runs itself — a tool that makes window washing fun. Come take a spin in a washing machine. Weather the storm in a dishwasher， and suck it up with a vacuum. Sweep it under the carpet? Embrace the prospect of spring cleaning.
- Added：2006
- Country：America
- Duration：60
- Time of update：2011/8/16 11:08:53