4.2.7 Bottom Ring圖片（共1張） :

        This is located at the bottom of the turbine guide vanes between the stay vane ring andthe draft tube, as shown in Fig.4.8. It has an upper annular ring with an external diameterequal to the internal diameter of the stay vanes ring and a lower annular por......（本文共 478 字, 1 張圖）     [閱讀本文] >>