| 单词 | heat coil |
| 释义 | > as lemmasheat coil heat coil n. a device fitted in a telephone exchange to protect the lines against small harmful currents. ΘΚΠ society > communication > telecommunication > telegraphy or telephony > telephony > telephone equipment > [noun] > exchange > exchange equipment private line1852 bank1884 call-disc1884 howler1886 trunk1889 multiple switchboard1891 rack1893 line switch1898 heat coil1900 relay rack1902 multiple1905 listening key1906 telharmonium1906 wiper1906 preselector1912 line finder1922 rank1924 routiner1928 keysender1929 uniselector1930 wiper arm1933 1900 K. B. Miller Amer. Telephone Pract. (ed. 3) xxiii. 275 A device to afford protection against currents such as these [sc. sneak currents]..is termed a heat coil. 1971 Gloss. Electrotechnical Power Terms (B.S.I.) iii. ii. 13 Heat coil, a thermal device to protect apparatus from damage by external currents. < as lemmas |
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