The cross- section curvature ductility ratio for R. C inequiaxial T - shaped, L - shaped and cress - shaped columns is calculated by numerical method.

Each width series has a certain ratio of bearing width t to the height of the bearing cross-section (Table 1.9).

Methods The manifestation, internal echo, the L/T ratio, CDFI and RI frequency spectrum feature of the superficial lymph nodes were studied with high frequency and color Doppler ultrasound 89 cases.