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| 71. | diffracted beam |
| 衍射射束|绕射射束 |
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| 72. | beam foundation |
| 梁式基础 |
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| 73. | bombarding beam |
| 轰击束 |
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| 74. | antiproton beam |
| 反质子束 |
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| 75. | corrective beam |
| 校正束 |
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| 76. | ultrasonic beam |
| 超声波束 |
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| 77. | crownblock beam |
| 天车梁 |
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| 78. | symmetrical beam |
| 对称束 |
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| 79. | polychromatic beam |
| 多色束 |
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| 80. | perforated beam |
| 多孔经轴 |
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