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A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
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FR418805D1909-07-311910-07-30Dispositif pour éviter, respectivement annuler, les inflammations en retour de gaz de mélanges de gaz explosibles
ExpiredFR418805A
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