单交体带。
Weiyu 17 is single cross hybrid which was combined with Qi 319 as the female parent and H564 as the male parent.
威玉17是威海市农业科学院以外引系齐319为母本,自选系h 564为父本组配而成的玉米单交种。
Analysis shows that it is the best way to improve the stress distribution of the twin-box single cross section of cable-stayed bridge by thickening the bottom flange.
分析表明:加厚底板对斜拉桥双箱单室箱形主梁应力分布的改善效果最佳。
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