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Title: 3 x-ray tubes with cathodes of different sizes [Go to resource]
Description: 3 x-ray tubes with cathodes of different sizes (a) small cathode; (b) large cathode; (c) large (hemispherical) cathode License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1916-27 Go to resource More Like this...
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