employ+battery
31Brushless DC electric motor — A microprocessor controlled BLDC motor powering a micro remote controlled airplane. This external rotor motor weighs 5 grams, consumes approximately 11 watts (15 millihorsepower) and produces thrust of more than twice the weight of the plane …
32Automatic quartz — is a collective term describing watch movements that combine a self winding rotor mechanism (as used in automatic mechanical watches) to generate electricity with a piezoelectric quartz crystal as its timing element. Such movements aim to provide …
33naval ship — Introduction the chief instrument by which a nation extends its military power onto the seas. Warships protect the movement over water of military forces to coastal areas where they may be landed and used against enemy forces; warships… …
34Power ring (DC Comics) — This article is about the Green Lantern Corps weapon. For the supervillains, see Power Ring (DC Comics). Power ring The Green Lantern Corps rings. Publication information …
35North-West Frontier (military history) — The North West Frontier was the most difficult area, from a military point of view, of the former British India in the Indian sub continent. It remains the frontier of present day Pakistan, extending from the Pamir Knot in the north to the Koh i… …
36Automated guided vehicle — The automated guided vehicle or automatic guided vehicle (AGV) is a mobile robot used in industrial applications to move materials around a manufacturing facility or a warehouse. Introduction Automated guided vehicles (AGVs) help to reduce costs… …
37MIM-104 Patriot — Patriot system of the German Luftwaffe Type Mobile Surface to air missile system Place of …
38Ignition system — For other uses, see Ignition system (disambiguation). An ignition system is a system for igniting a fuel air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used …
39North Carolina-class battleship — North Carolina steaming on 3 June 1946. By this time, many of the light anti aircraft weapons (Bofors 40 mm and Oerlikon 20 mm) mounted during the war had been removed, while more modern radars had been mounted on her forefunnel and mainmast …
40Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
