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| 71. | plug centre bit |
| 插头中心钻 |
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| 72. | shrouded sparking plug |
| 有罩火花塞 |
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| 73. | rubber oil plug |
| 橡胶油塞 |
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| 74. | plug compatible unit |
| 插接兼容部件 |
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| 75. | axial plug pump |
| 轴向柱塞泵 |
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| 76. | plug carrier assembly |
| 插头|插塞 |
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| 77. | plug and abandoned |
| 堵塞并弃井 |
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| 78. | plug compatible hardware |
| 插入式互换硬部件 |
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| 79. | plug and socket |
| 插头和插座 |
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| 80. | plug in connection |
| 插入式连接 |
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