Disclosed herein is a bio-soluble inorganic fiber with high tensile strength, manufactured in a method comprising: heating and melting a raw material which includes, on a weight basis, 60 to 80 percent of SiO2, 5 to 20 percent of MgO, 5 to 30 percent of CaO, 0. An auxiliary power generator generates auxiliary power in response to a cutoff signal. The legs of the chords have inwardly recessed portions to form a narrowed throat portion, which provides a stop against which the apex of the web abuts. The device also includes a motion detection module operable to detect motion of the handheld device within three dimensions and a device selection module operable to detect the device selection gesture based on the motion of the handheld device and to select a currently controlled one of the controllable devices in response to the device selection gesture. The center closure member operates to seal against an orifice in the adjustable nozzle and may deflect upon contact with the adjustable nozzle to account for misalignment issues that may arise during machining andor assembly of the flow control valve.