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H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
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FR474993D1914-07-111914-07-11Perfectionnements aux signaux d'alarme électriques
ExpiredFR474993A
(fr)