- electric vacuum meter
- 电气真空计
English-Chinese electron industry dictionary (英汉电子工程大词典). 2013.
English-Chinese electron industry dictionary (英汉电子工程大词典). 2013.
Vacuum plasmaspraying — (VPS) is a technology for etching and surface modification to create porous layers with high reproductibility and for cleaning and surface engineering of plastics, rubbers and natural fibres as well as for replacing CFCs for cleaning metal… … Wikipedia
Vacuum permeability — This article is about the magnetic constant. For the analogous electric constant, see vacuum permittivity. Vacuum permeability, permeability of free space, or magnetic constant is an ideal, (baseline) physical constant, which is the value of… … Wikipedia
Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… … Wikipedia
Electric current — Electromagnetism … Wikipedia
Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… … Wikipedia
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
Electric field — In physics, the space surrounding an electric charge or in the presence of a time varying magnetic field has a property called an electric field (that can also be equated to electric flux density). This electric field exerts a force on other… … Wikipedia
Electric displacement field — In physics, the electric displacement field, denoted as , is a vector field that appears in Maxwell s equations. It accounts for the effects of free charges within materials. D stands for displacement, as in the related concept of displacement… … Wikipedia
electric displacement — Elect. the part of the electric field that is determined solely by free charges, without reference to the dielectric properties of the surrounding medium: measured in coulombs per square meter. Symbol: D Also called displacement. [1880 85] * * *… … Universalium
meter — 1. The fundamental unit of length in the SI and metric systems, equivalent to 39.37007874 inches. Defined to be the length of the path traveled by light in a vacuum in 1299792458 sec. 2. A device for measuring the quantity of that which passes… … Medical dictionary
Noise-figure meter — A noise figure meter is an instrument for measuring the noise figure of an amplifier, mixer, or similar device. An example instrument is the 1983 era Agilent 8970A. Contents 1 Measurement methods 2 Noise source 2.1 Thermal noise … Wikipedia