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| 61. | polychromatic beam |
| 多色束 |
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| 62. | beam convergence |
| 电子束会聚 |
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| 63. | beam counterbalance |
| 抽油机游梁平衡重量 |
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| 64. | diffracted beam |
| 衍射射束|绕射射束 |
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| 65. | beam foundation |
| 梁式基础 |
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| 66. | crownblock beam |
| 天车梁 |
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| 67. | bombarding beam |
| 轰击束 |
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| 68. | ultrasonic beam |
| 超声波束 |
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| 69. | corrective beam |
| 校正束 |
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| 70. | symmetrical beam |
| 对称束 |
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