The rise of so-called vanity sizing has rendered most labels meaningless. As Americans have grown physically larger, brands have shifted their metrics to make shoppers feel skinnier—so much so ...

Prepare equations required to determine an actuator (i.e. pneumatic, hydraulic, or electric) size based on piston or effective diaphragm area and spring characteristics ... that influence control ...

Instead of trying to make an air-tight piston, he added a rubber membrane and a clever valve system to create a diaphragm air engine. This GIF is worth 115 words A round rubber diaphragm with a ...