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Devices Affording Protection Of Roads Or Walls For Sound Insulation
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Details Of Connecting Devices For Male And Female Coupling
(AREA)
FR708219D1930-03-061930-12-22Dispositif de sûreté pour les charges explosives utilisées dans les mines et autres exploitations analogues
ExpiredFR708219A
(fr)
Dispositif pour empêcher le dégagement des poussières de charbon ou de roche et les explosions des poussières de charbon dans les mines ou dans les exploitations analogues