- front tube sheet
- 前管板, 煙箱管板
English-Chinese dictionary. 2013.
English-Chinese dictionary. 2013.
Sheet film — is large format and medium format photographic film supplied on individual sheets of acetate or polyester film base rather than rolls. Sheet film was initially supplied as an alternative to glass plates. The most popular size measures 4×5 inches; … Wikipedia
Front panel — A front panel was used on early electronic computers to display and allow the alteration of the state of the machine s internal registers and memory. The front panel usually consisted of arrays of indicator lamps, toggle switches, and push… … Wikipedia
Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… … Wikipedia
Nixie tube — The ten digits of a GN 4 Nixie tube. A nixie tube is an electronic device for displaying numerals or other information. The glass tube contains a wire mesh anode and multiple cathodes. In most tubes, the cathodes are shaped like numerals.… … Wikipedia
Dry suit — A dry suit or drysuit provides thermal insulation or passive thermal protection to the wearer while immersed in water,[1][2][3][4] and is worn by divers, boaters, water sports enthusiasts, and others who work or play in or near cold water. A dry… … Wikipedia
Superheater — See superheating for the physics process. General arrangement of a superheater installation in a steam locomotive … Wikipedia
Vertical boiler — Detail of vertical boiler and associated steam engine in a working model steam launch … Wikipedia
Nickel Plate 587 — Nickel Plate Road 587 #587 in the restoration shops at the ITM Power type Steam Builder Baldwin Locomotive Works Serial number 49683 Model … Wikipedia
photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… … Universalium
printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… … Universalium
steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying … Universalium