| 单词 | power valve |
| 释义 | > as lemmaspower valve power valve n. (a) Electronics a thermionic valve designed to deliver a relatively high power; (b) Mechanics a power-operated mechanical valve. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve vacuum tube1859 trigger tube1894 audion1906 pliotron1915 diode1919 electron tube1919 negatron1919 pentode1919 power valve1919 tetrode1919 triode valve1919 magnetron1921 bright emitter1923 peanut valve1923 peanut1924 power tube1924 multiple valve1929 thyratron1929 heptode1932 hexode1933 pentagrid1933 acorn tube1934 octode1934 triode-pentode1936 triode-hexode1937 transitron1939 trochotron1947 steering diode1957 1919 W. D. Owen Guide Study Ionic Valve x. 38 Power valves need to be very hard otherwise the plate voltage would cause a discharge across the space. 1944 Wireless World June 163/2 Although power valves are used, they are only lightly loaded and HT volts and current are quite low. 1958 Times Rev. Industry July 32/2 Pressurized fluid is fed to the power valve which..actuates the brake. 1993 Guitarist Jan. 187/1 (advt.) Mesa Boogie 6L6GC power valves, 1 pair, new, £16 ono. 2001 Dirt Bike July 28/1 The centrifugal ball-ramp device will be replaced by an electric motor and a cable-actuated power valve. < as lemmas |
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