And there is a large circulargap at the centre of the blades, which is safer for Marine life.
在叶片中心有一个大的圆形空间，可以让水中生物安全通过。
2
Nonlinear finite element analysis, including 27 gap K-joints with square and circular hollow sections, has been carried out.
对27个主方支圆间隙K型相贯节点进行了非线性有限元分析。
3
Varied types of intersecting joints, including gap joint with positive eccentricity for the circular tubes and overlap joint for the square tubes, were also adopted in the design.