| 单词 | double-pole switch |
| 释义 | > as lemmasdouble-pole switch double-pole switch n. (see quot. 1940). ΚΠ 1920 Whittaker's Electr. Engin. Pocket-bk. (ed. 4) 419 For the control of c.c. motors, double-pole switches and fuses are commonly used. 1940 Chambers's Techn. Dict. 261/2 Double-pole, said of switches, circuit-breakers, etc. which can make or break a circuit on two poles simultaneously. 1951 Archit. Rev. 109 62/1 The two-meter unit for both power and lighting circuits has one 60 ampere switch and one 30 ampere double-pole switch. < as lemmas |
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