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| 71. | dispersion-shifted dual shape core fiber |
| 色散位移双层心光纤 |
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| 72. | rubber sleeve core barrel |
| 橡胶岩心套取心筒 |
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| 73. | retractable core bit |
| 可收缩取出的取心钻头 |
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| 74. | barrel-type core bit |
| 筒式取心钻头 |
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| 75. | basket-type core barrel |
| 篮式取心筒 |
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| 76. | The hard elastic core of a baseball;a rod with a hollow core. |
| 棒球的弹性硬心；空心钓竿 |
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| 77. | poor-boy core barrel |
| 手工制管式取心筒 |
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| 78. | core breaking by hydraulic pressure |
| 投球液压割心 |
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| 79. | extension core barrel |
| 可接长的取心筒 |
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| 80. | vacuum oil penetrator for hemp core |
| 麻心真空浸油器 |
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