electrical vibrator
21Antique radio — DIORA AGA RSZ 50 ca.1947 from Poland An antique radio is a radio receiving set that is collectible because of its age and rarity. Although collectors may differ on the cutoff dates, most would use 50 years old, or the pre World War II Era, for… …
22Car audio — Car audio/video (car AV), auto radio, mobile audio, 12 volt and other terms are used to describe the sound or video system fitted in an automobile. While 12 volt audio and video systems are also used, marketed, or manufactured for marine,… …
23Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …
24Mechanical rectifier — A mechanical rectifier is a device for converting alternating current (AC) to direct current (DC) by means of mechanically operated switches. The best known type is the commutator, which is an integral part of a DC dynamo but, before solid state… …
25Sex-machine — For other uses, see Sex machine. Masturbation Techniques Anal masturbation · …
26Motor-generator — Radio station motor generator set, converting from low to the high voltage power supply. This device is called an umformer in German. Dübendorf Museum of Military Aviation A motor generator (an M G set or a dynamotor for dynamo motor) is a device …
27Electrotherapy (cosmetic) — Cosmetic Electrotherapy micro current machine together with a selection of electrodes, made by Silver Fox (China) Cosmetic electrotherapy is a range of beauty treatments that uses low electric currents passed through the skin to produce several… …
28sound reception — Introduction response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly …
29BT-13 Valiant — infobox Aircraft name = BT 13 Valiant type = Trainer manufacturer = Vultee caption = BT 13 Valiant in flight designer = Richard Palmer first flight = March 1939 introduced = introduction= retired = status = primary user = USAAF more users = US… …
30List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …
