Weiyu 17 is singlecross 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。
3
Analysis shows that it is the best way to improve the stress distribution of the twin-box singlecross section of cable-stayed bridge by thickening the bottom flange.