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UNE 18052:1957 CONVEYOR BELTS COMPOSED OF RUBBER AND CLOTH. CHARACTERISTICS OF MATERIALS WHICH FORM THE BANDS.
UNE 30004:1957 CHEMICAL PRODUCTS. ANALYSIS REAGENTS. DETERMINATION OF ARSENIC.
UNE 28002-5:1957 AERONAUTICAL TERMINOLOGY. AERODYNAMICS.
UNE 28002-6:1957 'AERONAUTICAL TERMINOLOGY. ''PERFORMANCES'' OR AIRCRAFT ACTUATION.'
UNE 40008:1957 REPRESENTATIVE SIGNS OF MACHINERY. TEXTURE (WEAVING).
UNE 40024:1957 VERIFICATION OF THE REGULARITY OF REED OF LOOM.