trolleybus line 21 (Gdynia–Sopot)

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Trolleybus line 21 (Gdynia–Sopot) is an electric public transport route in northern Poland that connects the cities of Gdynia and Sopot within the Gdynia trolleybus network.

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Gdynia trolleybus system hasPart trolleybus line 21 (Gdynia–Sopot)