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Device with speaker and cord

An old hearing aid used before the advent of modern miniaturized hearing aids.
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Plate with lots of little holes

A plate designed to present lemon slices with toothpicks so that everyone can easily help themselves
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Capsules installed in the mountains

Devices used to trigger small controlled avalanches to prevent the accumulation of unstable snow.
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Doors cut in two parts

Called Dutch doors, they allow only the upper part to be opened to let in air and light.