noise-free operation
21Car 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,… …
22Level sensor — Level sensors are used to detect liquid level. The liquid to be measured can be inside a container or can be in its natural form (e.g. a river or a lake). The level measurement can be either continuous or point values. Continuous level sensors… …
23Headset (telephone/computer) — A headset is a headphone combined with a microphone. Used in call centers and by people in telephone intensive jobs, headsets provide the equivalent functionality of a telephone handset with hands free operation. Many people use headsets at the… …
24Neon sign — …
25Brushless 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 …
26Delhi Airport Metro Express —      Airport Express Line Overview Type Airport Express Train Termini …
27Surveyor 6 — Infobox Spacecraft Name= Surveyor 6 Caption=Surveyor model on Earth Organization=NASA Major Contractors= Hughes Aircraft Mission Type= Lander Satellite of= Moon Launch= November 7, 1967 at 07:39:00 UTC Launch Vehicle= Atlas Centaur Decay= Landed… …
28Garbage disposal — A garbage disposal, waste disposal unit, or garburator / garbarator (Canada) is a device, usually electrically powered, installed under a kitchen sink between the sink s drain and the trap which shreds food waste into pieces small enough to pass… …
29Daimler Roadliner — Manufacturer Daimler Motor Company/British Leyland Built at Coventry, Warwickshire, England Operator(s) British Electric Traction, various municipals and independents in …
30Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common …
