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管形截面
| 桁条
| 管形截面 | |
| bridg.constr. | tubular section |
| 桁条 | |
| archit. | blade |
| avia. | batten |
| construct. | joist |
| el. | carline |
| hydroel.st. | stringer; beam |
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| tubular section | |||
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管形截面 : 3 phrases in 1 subject |
| Technology | 3 |
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