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| 71. | bottom-supported fixed platform |
| 底部支撑的固定式平台 |
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| 72. | The bottom of a sea or a lake. |
| 水底部海洋或湖泊的底部 |
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| 73. | bottom sediment (settling) and water |
| 底部残渣与水 |
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| 74. | grain bottom auger |
| 底部谷粒螺旋推运器 |
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| 75. | B BOTTOM OF RADIATOR CLOSURE |
| B水箱罩底部 |
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| 76. | bottom loading transfer cask |
| 底部装料用传送容器 |
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| 77. | bottom mount drawer slide |
| 底部安装的抽屉滑道 |
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| 78. | Just cut it straight across the bottom . |
| 从底部剪齐。 |
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| 79. | open-bottom diving bell |
| 底部敞口式潜水钟 |
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| 80. | bottom hold down |
| 井底防上滑器；底部压住 |
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