Encara no tenim significats per a "electric doorbell".
1Cavendale pressed the push-button of the electric doorbell in a peculiar manner.
2Mr. Cowan believes he was the first to invent an electric doorbell, he also invented the world's first flashlight.
3The electric doorbell is important.
4On pressing the electric doorbell "a person, a housemaid by all appearances, came to let him in."
5While he was hooking up he explained that he had been to a nearby village for a dry battery for the electric doorbell.
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