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???

• 电离辐射防护屏障? 壁厚为150mm、200mm和250mm的铅屏蔽装置? 第一部分：150mm和200mm厚度的人字形装置