State system for ensuring the uniformity of measurements. State verification schedule for means measuring air kerma, air kerma rate, exposure, exposure rate, ambient dose equivalent, directional dose equivalent and personal dose equivalent, ambient dose equivalent rate, directional dose equivalent rate and personal dose equivalent rate and energy flux of X-ray and gamma radiation
Countersunk flat head screws (common head style) with type H or type Z cross recess. Product grade A. Part 2. Steel screws of property class 8.8, stainless steel screws and non-ferrous metal screws
