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| 金属开切口断面 | |||
| 开口截面; 开口断面 | |||
| 地基段 | |||
| 外露截面 | |||
| 空心断面; 桥梁的开断面; 地面铁路线; 开截面 | |||
| open section: 16 phrases in 5 subjects |
| Bridge construction | 8 |
| Communications | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |
| Wind Energy | 1 |
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