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| 之字形的; 折线形的; 折返段斜梁与下段在同一垂直面的楼梯 | |||
| dog legged: 22 phrases in 5 subjects |
| Agriculture | 1 |
| Architecture | 2 |
| Oil / petroleum | 1 |
| Technology | 13 |
| Textile industry | 5 |
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