Back Northern Line Catalan Northern Line (linka metra v Londýně) Czech Northern line Danish Northern Line German Northern line English Northern Line Spanish خط شمالی متروی لندن Persian Northern Line Finnish Northern line Faeroese Northern line French
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| Math | llinell trafnidiaeth gyflym, branched subway line  |
|---|---|
| Agoriad swyddogol | 18 Rhagfyr 1890 |
| Daearyddiaeth | |
| Gwlad |  Lloegr |
| Cyfesurynnau | 51.6505°N 0.1941°W |
| Hyd | 58 cilometr |
| Rheolir gan | Transport for London |
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Llinell ar Reilffordd Danddaearol Llundain yw'r Northern Line a ddangosir gan linell ddu ar fap y Tiwb. Agorodd y llinell hon rhwng Stockwell a Borough ym 1890, a dyma'r rhan hynaf o diwb lefel-ddofn y rhwydwaith.
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