The results show that stress in hollow beam and semi-shaft bush is much less than permissible stress, while joint of suspension frame and axle housing has too large local stress.

As to the serious problems of yarn defect in the hollow leg of the full closed flyers on the roving frames, idea of semi-closed flyers is put forth for consideration.

Existing models of joints 'were based on the semi-rigid beam-column joints of steel frames and had many limitations, so they were not suited to welded hollow spherical joints.