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device for ionisationsmessung example: x-rays roentgenstrahlen uf roentgen rays against the horizontal plane of any direction by means of a rotatable, symmetry or rotationssymmetrieachse particular ionization chamber
device for ionisationsmessung example: x-rays roentgenstrahlen uf roentgen rays against the horizontal plane of any direction by means of a rotatable, symmetry or rotationssymmetrieachse particular ionization chamber