Praca Wdowy Oświetla Statki Na Morzu
Widow's Work Lights Ships at Sea
Determinacja wdowy przekształciła niedokończony pomysł jej męża na rakiety sygnałowe w system komunikacji marynarki wojennej ratujący życie po latach wytrwałego eksperymentowania.
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Polish • English
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Widow's Work Lights Ships at Sea
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persistence
invention
maritime safety
women inventors
signal technology
hard work
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