The Family Handyman on MSN

The Best Leaf Vacuums for Maintaining a Pristine Lawn, Tested and Reviewed

Our Product Testing Team vacuumed over 500 gallons of leaves to find the the best leaf vacuums for quick and convenient fall ...
IEEE

A Novel High-Efficient and Miniaturized Operating Method for Ultra-Fast Vacuum Switch

Abstract: As one of the most important component in mechanical and hybrid dc breaker (MCB and HCB), operating time of ultrafast vacuum switch (VS) determines the breaking speed of MCB and HCB. However ...