Each width series has a certain ratio of bearing width t to the height of the bearing cross-section (Table 1.9).
每个宽度系列具有一定比例的宽度和高度(表1.9)轴承。
2
Methods The manifestation, internal echo, the L/Tratio, CDFI and RI frequency spectrum feature of the superficial lymph nodes were studied with high frequency and color Doppler ultrasound 89 cases.