双线箱梁
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double line box beam
以上为机器翻译结果,长、整句建议使用 人工翻译 。
A great amount of post tensioned pre-stressing concrete single box beam for double track (as called the box beam hereinafter) has been used on the line.
该线大量采用后张法预应力混凝土双线单箱简支箱梁。
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