Methods of testing soils for engineering purposes, Method 5.7.1: Soil compaction and density tests - Compaction control test - Hilf density ratio and Hilf moisture variation (rapid method)
Edition 2006

Acoustics - Determination of sound absorption coefficient and impedance in impedances tubes - Part 1: Method using standing wave ratio. (ISO 10534-1:1996)
Edition 2002-07-29

Connectors for electronic equipment - Tests and measurements - Part 25-7: Test 25g - Impedance, reflection coefficient and voltage standing wave ratio (VSWR)
Edition 2005-09-14

Products and systems for the protection and repair of concrete structures - Test methods - Determination of the expansion ratio and expansion evolution
Edition 2005-12-14

Road and airfield surface characteristics - Part 7: Procedure for determining the skid resistance of a pavement surface using a device with longitudinal fixed slip ratio (LFCG): the GripTester(r)
Edition 2010-06-29

Foodstuffs - HPLC method for the determination of xanthophylls in fish flesh - Part 2: Identification of the enantiomer ratio of astaxanthin
Edition 2012-04-04

Stationary source emissions - Determination of the ratio of biomass (biogenic) and fossil-derived carbon dioxide - Radiocarbon sampling and determination (ISO 13833:2013)
Edition 2013-09-25

Radio-frequency connectors - Part 1-4: Electrical test methods - Voltage standing wave ratio, return loss and reflection coefficient
Edition 2021-04-21

Unbound and hydraulically bound mixtures - Part 47: Test method for the determination of California bearing ratio, immediate bearing index and linear swelling
Edition 2022-09-14

Paints and varnishes - Electro-deposition coatings - Part 16: Pigment-binder ratio (ISO 22553-16:2022)
Edition 2024-04-10