Functional safety. Safety instrumented systems for the process industry sector. Part 4. Explanation and rationale for changes in IEC 61511-1 from Edition 1 to Edition 2
State system for ensuring the uniformity of measurements. State service of standard reference data in the field of use of atomic energy. Standard reference data for atomic energy service. Classifiers of standard reference data on physical constants and properties of substances and materials for atomic energy service. Basic provisions
