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| 71. | an arch supported by an abutment. |
| 由桥礅支撑的一个拱。 |
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| 72. | double-cover butt joint |
| 双盖板对接 |
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| 73. | flash butt weld |
| 电弧对接焊 |
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| 74. | butts and bound |
| 地界|地端对接 |
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| 75. | flash butt welding machine |
| 闪光对接焊机 |
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| 76. | butting optical fiber |
| 对接式光纤 |
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| 77. | single welded butt |
| 单面焊对接 |
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| 78. | To remove an abutment using forceps grasp the abutment with a definite purchase and apply a simultaneous |
| 要拔除一颗支台是用钳子抓牢支台，同时加上旋转及拔起动作即能将支台离开植体。 |
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| 79. | butt welded joint |
| 对接焊节点 |
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| 80. | flash butt-welded anchor chain cable |
| 闪光对接焊锚链 |
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