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| 预应力混凝土桩 | |||
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| 预应力混凝土桩 | |||
| 预应力混凝匕桩 | |||
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prestressed-concrete pile : 13 phrases in 4 subjects |
| Bridge construction | 4 |
| Engineering geology | 1 |
| Rail transport | 1 |
| Technology | 7 |
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