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G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K7/00—Sirens
G10K7/06—Sirens in which the sound-producing member is driven by a fluid, e.g. by a compressed gas
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FR332826D1903-06-051903-06-05Perfectionnements apportés aux dispositifs producteurs de sons, convenant pour sirènes et instruments analogues
ExpiredFR332826A
(fr)