Object's details: Sposób i urządzenie do mierzenia ilości gazu w zastosowaniu np., do aparatów oddechowych : opis patentowy : nr 12604 : kl. 42 e 25
Provider:Polona
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Filtr do kilkakrotnego napełniania do aparatów oddechowych : opis patentowy : nr 13590 : kl. 61 a 19
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