A method for customizing the functionality of a web-browser extension by installing widgets in the web-browser extension. The drill body has at least two chip flutes, which are delimited at their flanks by ribs and at least one of which is spirally curved. The amount of gas supplied to the airbags is preferably substantially proportional to the torque roll force at each of the airbags. The inverter bridge is configured to provide a voltage to the stator, and includes a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch. As the bladder or balloon expands, portions of body tissue are deflected under the influence of force applied to the body tissue by the bladder or balloon. An electrically powered device is disposed in the pipeline.