73205850
Mar 2, 1979
Aug 12, 1980
CHEMICAL SOLUTIONS CONTAINING PHOSPHORUS FOR THE PREVENTION OF CORROSION OF METAL SURFACES AND THE TREATMENT OF METAL SURFACES SO AS TO OBTAIN IMPROVED RESISTANCE TO CORROSION OF THE SURFACE WHEN SUBSEQUENTLY PAINTED, USED BY STEEL WORKERS, METAL FABRICATORS AND OTHERS IN THE METAL WORKING INDUSTRY
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