72340160
Dec 13, 1971
May 30, 1972
INSTITUT DR. FRIEDRICH FORSTER PRUFGERATEBAU
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INSTRUMENT FOR THE EXACT MEASUREMENT OF THE THICKNESS OF NON-CONDUCTIVE FILMS ON NON-FERROMAGNETIC METAL, FOR EXAMPLE, ANODISED FILMS, VARNISH, ENAMEL, CERAMIC, AND PLASTIC COATINGS