| 单词 | switch-signal |
| 释义 | > as lemmasswitch-signal switch-signal n. a signal indicating the position of a railway switch. ΘΚΠ society > travel > rail travel > railway system or organization > [noun] > types of signal system > types of signal switch-signal1838 semaphore signal1845 distance signal1848 home signal1857 block signal1864 dwarf signal1870 distant signal1874 switch-lantern1875 distant1881 spectacle1881 switch-lamp1898 banjo1902 peg1911 1838 Civil Engineer & Architect's Jrnl. 1 358 Railway Switch Signal. < as lemmas |
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