... 主曲率中心 principal centers of curvature 主特征标 principal character 主弦 principal chord ...
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采用标准节主弦杆焊胎可调措施，保证焊后尺寸。
附加弯矩导致桅杆的后背主弦杆受拉，传统的螺栓连接方法显得薄弱。
The additional bending moment results in the pulling state of rear back rod of the mast and the conventional bolt connection seems to be very weak.
研究表明，无论支弦杆受拉或受压，随主弦杆拉力的增加，节点承载力逐渐降低。
The results show that the bearing capacity decreases gradually with the tension of chord increasing.
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