air pressure probe
31Siege of Malta (World War II) — Siege of Malta Part of the Second World War Mediterranean theatre …
32Polysomnogram — (PSG) is a multi channel ( poly ) recording ( gram ) during sleep ( somno ), resulting from a sleep test, polysomnography. A doctor may order a polysomnogram because the patient has a complaint such as daytime fatigue or sleepiness that may be… …
33Outline of hydrology — The following outline is provided as an overview of and topical guide to hydrology: Hydrology – study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and… …
34Engine control unit — An engine control unit (ECU) is an electronic control unit which controls various aspects of an internal combustion engine s operation. The simplest ECUs control only the quantity of fuel injected into each cylinder each engine cycle. More… …
35Xylem — Multiple cross sections of a flowering plant stem showing primary and secondary xylem and phloem[1] Xylem is one of the two types of transport tissue in vascular plants. (Phloem is the other). The word xylem is derived from the Classical Greek… …
36Mars Global Surveyor — Artist s conception of Mars Global Surveyor Operator NASA Major contractors Orbiter Satellite of …
37Pan Am Flight 103 — Flight 103 redirects here. For other uses, see Flight 103 (disambiguation). Pan Am Flight 103 CGI impression of Clipper Maid of the Seas immediately after the explosion Occurrence summary …
38Duct (HVAC) — A round galvanized steel duct connecting to a typical diffuser Fire resistance rated …
39Moon landing — For other uses, see Moon landing (disambiguation). Still frame from the video transmission of Neil Armstrong stepping onto the surface of the Moon at 02:56 UTC on 21 July 1969. An estimated 500 million people worldwide watched this event,… …
40Tympanometry — is an examination used to test the condition of the middle ear and mobility of the eardrum (tympanic membrane) and the conduction bones by creating variations of air pressure in the ear canal.Tympanometry is an objective test of middle ear… …
