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| 扩孔钻头以硅酸盐和氧化钙为主要成分的混合物。利用水化反应产生的膨胀力传递到物体上，实现无声响、无振动地破碎混凝土和建筑物等 | |||
| 扩孔器 | |||
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hole reamer : 7 phrases in 3 subjects |
| Drilling | 2 |
| Shipbuilding | 1 |
| Technology | 4 |
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