| 词汇 | tungsten |
| 释义 | tungsten noun[ U ] uk /ˈtʌŋ.stən/ us /ˈtʌŋ.stən/(symbolW) a chemical element that is a hard metal used in making light bulbs and strong types of steel: 钨 tungsten steel钨钢 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal You can also find related words, phrases, and synonyms in the topics: Chemistry: metals & metalworking Examples of tungstentungsten Second, the intensity of the tungsten halogen lamps could be reduced in order to lower the thermal heating of plant canopies. Since the beam's energy deposition will melt and evaporate even tungsten, non-intercepting diagnostics are required. Because of their specific structural, electrical, mechanical and optical properties, tungsten- titanium thin films 0 coatings have many promising applications. The insulation times of aluminum and tungsten wires are proportional to the length. A higher kinetic energy of the tungsten ions means that the plasma streams inside the array, including the region near the axis, are collisionless. The secondary is suspended off of the tungsten wires and becomes par t of the power feed to supply current to the upper pinch. Large and fresh samples were split, jaw-crushed and reduced to powder in a tungsten carbide shatterbox. This drive contained a tungsten-in-glass microelectrode which passed out of the guard tube and into the brain. Insulated tungsten electrodes were lowered through the dura into the thalamus. The resistance of tungsten wire at room temperature is two times higher than that of aluminum wire, and three times higher than that of copper. Three different types of microelectrodes were utilized: varnish-insulated tungsten, glass pipette, or glass-coated platinum-iridium. Dormancy may be induced by long days at least when tungsten bulbs are used for daylength extension. In this long-pulse mode, tungsten wire arrays radiated very effectively. The tungsten-tip cathode in the diode had diameter 4 mm and the stainless-steel anode had aperture 20 mm. The ambient illumination in the testing room was provided by a distant tungsten-halogen lamp and the background illumination around the apparatus was low photopic. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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