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(de )
1904-08-10
Vorrichtung zum Öffnen und Schließen einer Gasleitung.
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(de )
Vorrichtung zur selbstthätigen Entlüftung von Hebern
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(de )
1930-12-19
Gassicherheitsventil
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(de )
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(de )
1933-01-05
Sicherheitsvorrichtung fuer Regenerativofenanlagen
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(de )
Petroleumlampe mit Regulator
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