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Byrna.
Byrna
Byrna to je zorta lampy na sztrům, we keryj śwjotło dowo kůnsek przewodu rozhajcowany bez sztrům do wysokij tymperatury. Coby śy tyn przewůd ńy utlyńił, umjyszczo śe go we kugli s glasu, we keryj ńi ma luftu yno průżńa abo miszůng gazůw uobojyntnych. S anfanga przewůd ůunaczůno s grafitu, ńyskorzi s wolframu. Pjyrsze průby zůunaczyńo byrny bůły we 1854 roku, a pjyrszo byrna kero nodowoła śe do użytku powstoła we 1878 roku (uopatyntowou ja Joseph Wilson Swan).
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