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| 81. | small open drum |
| 小开口桶 |
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| 82. | tap hole of blast furnace |
| 高炉开口机 |
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| 83. | split thread ring |
| 开口带线圈 |
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| 84. | sectional adjusting ring |
| 开口调整圈 |
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| 85. | angiostomy cannula |
| 血管开口套管 |
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| 86. | hydraulic open-die forging press |
| 开口模锻水压机 |
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| 87. | He refused to open his lips. |
| 他拒不开口。 |
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| 88. | runner blade opening |
| 转轮叶片开口 |
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| 89. | central closing |
| 中间开口处 |
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| 90. | pore-aperture radius |
| 孔隙开口半径 |
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