Enclosures for protection against ionizing radiation — Lead shielding units for 150 mm, 200 mm and 250 mm thick walls — Part 1: Chevron units of 150 mm and 200 mm thickness
电离辐射防护外壳——150 mm、200 mm和250 mm厚壁用铅屏蔽装置Spart 1:150 mm和200 mm厚的V形装置
Specifies the properties of the various lead units used in the construction of basic units (bricks, posts) and functional units (aperture bricks, windows, sphere units, plugs and reducing units). Annex A is for information only.