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| 混凝土无损检验测试锤 | |||
| 检修用手锤; 测试锤 (非破损法测定混凝土强度) | |||
| test hammer: 22 phrases in 6 subjects |
| Bridge construction | 1 |
| Engineering geology | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 14 |
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