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UNE 34210:1981 SODIUM CHLORIDE. DETERMINATION OF FLUORIDE CONTENT. PHOTOMETRIC METHOD WITH SODIUM 2-(SULFOPHENYLAZO)-1,8 DIHYDROXYNAPHTHALENE-3,6 DISULFONATE (SPADNS).
UNE 34209:1981 SODIUM CHLORIDE. DETERMINATION OF IRON CONTENT. PHOTOMETRIC METHOD WIT, 1,10-PHENANTHROLINE.
UNE 34231:1981 SODIUM CHLORIDE. DETERMINATION OF HEXACYANOFERRATE (II), SOLUBLE IN WATER. PHOTOMETRIC METHOD AS PRUSSIAN BLUE.
UNE 20617:1981 CHARACTERISTICS OF ANTI-SCATTER GRIDS USED IN X-RAY EQUIPMENT
UNE 34232:1981 SODIUM CHLORIDE USED AS TABLE SALT. DETERMINATION OF PARTICLE SIZE DISTRIBUTION BY MECHANICAL SIEVING.
UNE 18064:1981 BEARINGS. AXIAL BALL BEARINGS TOLERANCES, WITH FLAT SEAT. NORMAL QUALITIES, 6, 5 AND 4.
UNE 20606-8:1981 ELECTROMECHANICAL COMPONENTS FOR ELECTRONIC EQUIPMENT: BASIC TESTING PROCEDURES AND MEASURING METHODS. CONNECTOR TESTS (MECHANICAL) AND MECHANICAL TESTS ON CONTACTS AND TERMINATIONS
UNE 20629-0:1981 CONNECTORS FOR FREQUENCIES BELOW 3 MHZ. GUIDE TO DRAWING INFORMATION IN DETAIL SPECIFICATIONS
UNE 20629-1:1981 CONNECTORS FOR FREQUENCIES BELOW 3 MHZ. GENERAL REQUIEREMENTS AND MEASURING METHODS
UNE 20629-3:1981 CONNECTORS FOR FREQUENCIES BELOW 3 MHZ (MC/S). BATTERY CONNECTORS
UNE 20636-6:1981 HIGH FIDELITY AUDIO EQUIPMENT AND SYSTEMS. MINIMUM PERFORMANCE REQUIREMENTS. AMPLIFIERS