And there is a large circular gap 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。
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。
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.
设计中还采用了多种形式的相贯节点，包括圆管正偏心的间隙接头及方管的搭接接头。
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