State system for ensuring the uniformity of measurements. Measuring transducers for pressure differences with unified current output signals of the SSI. Methods and means of verification
Connecting devices for low voltage circuits for household and similar purposes. Part 2-3. Particular requirements for connecting devices as separate entities with insulation piercing clamping units
Methods for the petrographic analysis of bituminous coal and anthracite. Part 4. Method of determining microlithotype, carbominerite and minerite composition
