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21. | At first the piece of metal must be hammered thin. |
| 首先,要把这块金属用锤锤 |
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22. | veneering hammer |
| 胶合锤 |
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23. | alarm hammer lever |
| 闹锤杆|打锤杆 |
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24. | spalling hammer |
| 碎石锤 |
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25. | stamping hammer |
| 模锻锤;捣锤;冲压锤 |
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26. | steam pile hammer |
| 蒸汽打桩锤;汽桩锤 |
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27. | cross-peen sledge |
| 地质手锤;锤顶尖楞方向与手柄垂直的锤 |
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28. | oscilllating weight |
| 自动锤 |
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29. | compressed air hammer |
| 压缩气锤;风铆锤;风动锤 |
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30. | stria mallearis |
| 锤纹 |
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