rectangular frame
| culvert
| rectangular frame abbr. | |
| tech. | 长方形框架 |
| culvert abbr. | |
| desert. | 暗沟; 排水渠 |
| hydroel.st. | 涵洞; 电缆管道 |
| met. | 阴沟; 暗渠 |
| oil | 沟道; 下水道; 线渠 |
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| 长方形框架 | |||
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rectangular frame : 14 phrases in 2 subjects |
| Rail transport | 1 |
| Technology | 13 |