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G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
G21G4/00—Radioactive sources
G21G4/04—Radioactive sources other than neutron sources
G21G4/10—Radioactive sources other than neutron sources with radium emanation
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FR587079D1924-10-091924-10-09Appareils pour rendre des liquides radioactifs par l'émanation du radium ou conserver la radioactivité de ces liquides
ExpiredFR587079A
(fr)