- vacuum length standard
- Метрология: эталонная установка для воспроизведения метра в длинах волн излучения в вакууме
Универсальный англо-русский словарь. Академик.ру. 2011.
vacuum length standard
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Vacuum sewer — Vacuum sewers were first installed in Europe in 1882 but until the last 30 years it had been relegated to a niche market. The first who has applied the negative pressure drainage (so called vacuum sewerage) was the Dutch engineer Liernur in the… … Wikipedia
Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner … Wikipedia
Vacuum brake — The vacuum brake is a braking system used on trains. It was first introduced in the mid 1860s and a variant, the automatic vacuum brake system became almost universal in British train equipment, and in those countries influenced by British… … Wikipedia
Vacuum gauge — Gauge Gauge, n. [Written also gage.] 1. A measure; a standard of measure; an instrument to determine dimensions, distance, or capacity; a standard. [1913 Webster] This plate must be a gauge to file your worm and groove to equal breadth by. Moxon … The Collaborative International Dictionary of English
Vacuum permittivity — This article is about the electric constant. For the analogous magnetic constant, see vacuum permeability. For the ordinal in mathematics ε0, see epsilon naught. The physical constant ε0, commonly called the vacuum permittivity, permittivity of… … Wikipedia
Standard Corridor — British Rail Second Corridor A Mk1 Second Corridor (SK) coach at the North Norfolk Railway in 2007 In service 1951– Manufacturer BR Ashford/Easteigh, Derby (C W), Doncaster … Wikipedia
Central vacuum cleaner — The power unit of a typical central vacuum cleaner for residential use A central vacuum cleaner (also known as built in or ducted) is a type of vacuum cleaner appliance, installed into a building as a semi permanent fixture. Central vacuum… … Wikipedia
List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… … Wikipedia
Optical path length — In optics, optical path length (OPL) or optical distance is the product of the geometric length of the path light follows through the system, and the index of refraction of the medium through which it propagates. A difference in optical path… … Wikipedia
Coherence length — In physics, coherence length is the propagation distance from a coherent source to a point where an electromagnetic wave (or wave packet, wave function, etc.) maintains a specified degree of coherence. The significance is that interference will… … Wikipedia
Australian Standard Garratt — Infobox Locomotive name = Australian Standard Garratt caption = ASG No. G33 as preserved, 2007 powertype = steam data for = Australian Standard Garratt builder = whytetype = 4 8 2+2 8 4 numinclass = 65 length = 85 ft 9½ in (26.15 m) driversize =… … Wikipedia
