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| 81. | butt head against |
| 有效地抵抗 |
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| 82. | butt welded casing |
| 对焊套管 |
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| 83. | butt welding machine |
| 对焊机 |
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| 84. | butt-ended tube |
| 平头管 |
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| 85. | butt(ing) angle |
| 平接角钢 |
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| 86. | butt face dowel |
| 平接面定缝销钉 |
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| 87. | lock butt joint |
| 端销接合 |
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| 88. | butt resistance welder |
| 电阻对焊机 |
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| 89. | loose butt hinge |
| 活叶铰链 |
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| 90. | butt-welded drill |
| 对头焊接钻头 |
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