| 单词 | closed circuit |
| 释义 | > as lemmasclosed circuit closed circuit n. a complete, unbroken circuit; frequently attributive; spec. (a) a complete electrical circuit formed entirely of conductive material; (b) a system of radio or television whereby the signal is transmitted by wire to the receiver and not broadcast for general reception; (c) a breathing apparatus that converts exhaled gases into oxygen for inhaling. ΘΚΠ society > communication > broadcasting > [noun] > systems or methods closed circuit1827 hookup1903 network1914 narrowcasting1924 rediffusion1931 networking1940 digital1978 the world > matter > physics > electromagnetic radiation > electricity > circuit > [noun] > unbroken closed circuit1827 the world > matter > physics > electromagnetic radiation > electricity > circuit > [adjective] > completed closed circuit1827 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > electronic circuit > [noun] > other electronic circuits closed circuit1827 magnetic circuit1853 earth return1869 control circuit1892 Armstrong1916 rejector circuit1919 rejector1920 acceptor1921 biotron1921 stabilizer1924 ring modulator1936 squelch1937 load1943 multiar1946 clamp1947 integrating circuit1948 matrix1948 AND gate1959 biocircuit1963 society > communication > broadcasting > [adjective] > systems or methods > closed-circuit closed circuit1941 off-air1961 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > electronic circuit > [adjective] coupledc1440 inductive-coupled1913 closed circuit1941 printed1946 bistable1949 astable1951 busy-idle1951 monolithic1963 optocoupled1976 the world > action or operation > safety > protection or defence > [noun] > means of protection or defence > device or contrivance to protect a thing or person > protection worn on face > respirator mouthpiece1790 nosebag1834 respirator1836 inhaler1864 smoke respirator1866 aerophore1876 open circuit1876 inspirator1898 muzzle1899 smoke helmet1900 gas helmet1910 gas mask1915 mask1915 oxygen mask1920 inhalator1929 closed circuit1953 1827 J. Cumming Man. Electro Dynamics 230 If a series of galvanic elements be placed in order round the circumference of a circle, and forming a closed circuit, a current will circulate in it continually. 1832 Nat. Philos. (Libr. Useful Knowl.) II. Electro-magnetism xi. §232 When an electric current, after traversing a certain line..returns upon itself..it has been denominated a closed circuit. 1925 P. J. Risdon Crystal Receivers & Circuits 22 It should perhaps be explained here that an aerial circuit is known as an ‘open’ circuit, and a receiver circuit as a ‘closed’ circuit. 1930 Engineering 28 Feb. 279/2 The fire-alarm system is of the pre-signal, electrically supervised, closed-circuit, code-ringing type. 1941 B.B.C. Gloss. Broadcasting Terms 6 Closed circuit, channel between microphone and loudspeaker, or between microphone and recording unit, for testing, rehearsal, or other purposes not involving broadcast transmission. Hence closed-circuit recording. 1946 T. H. Hutchinson Here is Television 363 Closed circuit. The picture is not broadcast, but fed to viewing screens at certain locations by wire. 1951 Time 25 June 49/1 Though not telecast over the air, the Louis–Savold fight was experimentally piped by coaxial cable over closed circuits to six cities. 1953 J. Hunt Ascent of Everest 257 Three principal types of (oxygen) apparatus were used: Open-Circuit, Closed-Circuit and Sleeping Sets. 1954 B. North & R. North tr. M. Duverger Polit. Parties i. iii. 152 Here the parliamentary representatives are chosen by the inner circle; the party in this case is a closed circuit. 1957 Times 22 Oct. 10/1 Later their occupants watched and heard the after-dinner speakers on closed-circuit television. < as lemmas |
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