Physics. A mass of material, usually lead or concrete, intended to absorb neutrons and other ionizing radiation emitted by a reactor or…
| 单词 | θ79023 |
| 释义 | the world > matter > physics > atomic physics > particle physics > particle accelerator > [noun] > protection against (1) shield1933 Physics. A mass of material, usually lead or concrete, intended to absorb neutrons and other ionizing radiation emitted by a reactor or… |
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