Direct acting indicating analogue electrical measuring instruments and their accessories: Part 1 definitions and general requirements (Fourth Revision)
Measurement of fluid flow by means of pressure differential devices inserted in circular crossSection conduits running full: Part 1 : general principles and requirements (First Revision)
Horizontal centrifugal pumps for clear, cOld water: Part 2 general pmUrpose (Other than agricultural and rural water supply) - Specification (Second Revision)