vacuum holder
21Electron beam physical vapor deposition — or EBPVD is a form of physical vapor deposition in which a target anode is bombarded with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous… …
22David T. Kenney — (April 3, 1866 May 26?, 1922) was an inventor with nine patents, granted between 1903 and 1913, applicable to both machine driven and manual vacuum cleaners, dominated the vacuum cleaner industry in the United States until the 1920s. Contents 1… …
23Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
24Professional Coin Grading Service — PCGS is the acronym for Professional Coin Grading Service a third party grading service for grading rare coins. Founded in 1986, and located in Newport Beach, CA., it is a subsidiary of Collector s Universe, Inc. (NASDAQ:CLCT), a company that… …
25Reginald Fessenden — Infobox Celebrity name = Reginald Fessenden caption = The Father of Radio Broadcasting birth date = birth date|1866|10|6|mf=y birth place = East Bolton, Quebec, Canada death date = death date and age|1932|7|22|1866|10|6|mf=y death place = Bermuda …
26Vacutainer — is a registered brand of test tube specifically designed for venipuncture. It was developed in 1947 by Joseph Kleiner,cite journal | author = Rosenfeld L | title = A golden age of clinical chemistry: 1948 1960 | journal = Clin Chem | volume = 46… …
27Headlamp — Headlight redirects here. For other uses, see Headlight (disambiguation). High Beams redirects here. For the urban legend also known by that name, see Killer in the backseat. A motor scooter s front with an impractical number and variety of… …
28Plasma-immersion ion implantation — (PIII) [cite book | title = Materials Science of Thin Films | author = Milton Ohring | publisher = Academic Press | year = 2002 | isbn = 0125249756 | url = http://books.google.com/books?id=SOt yFjV xwC pg=PA267… …
29Venipuncture — In medicine venipuncture or venepuncture (also known as phlebotomy, venesection, blood draw, drawing blood or taking blood) is the process of obtaining a sample of venous blood. Usually a 5 ml to 25 ml sample of blood is adequate depending on… …
30Space toilet — A space toilet, or zero gravity toilet, is a toilet that can be used in a weightless environment. In the absence of weight the collection and retention of liquid and solid waste is directed by use of air flow. Since the air used to direct the… …
