72286458
Dec 8, 1967
Jan 21, 1969
LIQUID HYDROCARBON COMPOUNDS FOR PENETRANT INSPECTION, BOTH VISIBLE AND FLUORESCENT, DEVELOPERS AND FIXERS THEREFOR
Metal GoodsINDUSTRIAL CLEANERS USED IN NONDESTRUCTIVE TESTING; AND REMOVERS FOR PENETRANT COMPOSITIONS USED IN NONDESTRUCTIVE TESTING
Metal Goods