UNE - Spanish national standards

Methods of test for masonry units - Part 9: Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling

Available languages: English, Spanish

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Methods of test for masonry units - Part 9: Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling

Available languages: English, Spanish

Available design: electronic design (pdf), Print design

Hydrometry - Vocabulary and symbols (ISO 772:2022)

Available languages: English, Spanish

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Fasteners - Prevailing torque hexagon nuts - High nuts (all metal) with slot(s) (ISO 7720:2025)

Available languages: English, Spanish

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AIR QUALITY. DETERMINATION OF GASEOUS SULPHUR COMPOUNDS IN AMBIENT AIR. SAMPLING EQUIPMENT.

Available languages: Spanish

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AIR QUALITY. DETERMINATION OF MASS CONCENTRATION OF SULPHUR DIOXIDE IN AMBIENT AIR. THORIN SPECTROPHOTOMETRIC METHOD.

Available languages: Spanish

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AIR QUALITY. GENERAL ASPECTS. VOCABULARY.

Available languages: Spanish

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AMBIENT AIR. DETERMINATION OF A GASEOUS ACID AIR POLLUTION INDEX. TITRIMETRIC METHOD WITH INDICATOR OR POTENTIOMETRIC END-POINT DETECTION.

Available languages: Spanish

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GASEOUS EMISSIONS. REQUERIMENTS OF CONTINUOUS MONITORING FOR THE MEASUREMENT OF OPACITY

Available languages: Spanish

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COUNTERSUNK FLAT HEAD SCREWS. PART 2: PENETRATION DEPTH OF CROSS RECESSES. (ISO 7721-2:1990).

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