positive dihedral angle

例句：

1. 1. The positivedihedral angle between the twoplates is crucial for the stability of thestructure.
   两个板之间的正交角对于结构的稳定性至关重要。
2. 2. In the design of abridge, the positive dihedralangle between the deck and the piersis an important factor to consider.
   在桥梁设计中，桥面板与桥墩之间正交角是一个需要考虑的重要因素。
3. 3. Theengineers carefully calculated the positive dihedral angle to ensure the structural integrityof the building.
   工程师们仔细计算了正交角以确保建筑物的结构完整性。