| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems in a conventional radiation shielding sheet where Pb powder is mixed to easily occur Pb intoxication or Pb pollution in each process of manufacture, use, and disposal and a pinhole is easily formed to transmit a radiation through the pinhole. SOLUTION: Metal powders 12, 13 and 14 of W, Sb and Sn are mixed and dispersed within a vinyl chloride resin 11.
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