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| 81. | rigid fixed bridge |
| 双端固定桥 |
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| 82. | rigid chain polymer |
| 刚性链聚合物 |
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| 83. | rigid coaxial tubing |
| 同轴硬馈管 |
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| 84. | rigid mica sheet |
| 坚实云母片 |
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| 85. | rigid cover plate |
| 刚性盖板 |
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| 86. | rigid expanded plastics |
| 硬泡沫塑料 |
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| 87. | rigid crossing frog |
| 固定式交叉辙叉 |
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| 88. | rigid fuel pipe |
| 刚性燃油管 |
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| 89. | rigid disk drive |
| 硬磁盘机 |
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| 90. | rigid plastic body |
| 刚性塑料体 |
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