| 单词 | multiple switchboard |
| 释义 | > as lemmasmultiple switchboard multiple switchboard n. Telephony (now historical) a manual switchboard in which each subscriber's circuit is repeated so as to make it accessible to each operator. 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 1891 J. Poole Pract. Telephone Handbk. viii. 148 (heading) Multiple switch-boards. 1969 S. F. Smith Teleph. & Telegr. A iv. 98 The need for a series type of multiple connexion which these jacks require on a multiple switchboard has certain disadvantages. 1994 Amer. Hist. Rev. 99 1082 Multiple switchboards were the crucial hardware of this techno-labor system. < as lemmas |
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