The U type seal ring being additionally pressed against the axial faces by the steam pressure and the I type seal ring. Allowing an axial offset of the stationary blade carrier, seal the space between carrier and barrel casing against the adjacent spaces
參考答案:U型环被蒸汽压力和I型密封环压在轴向位置。允许静叶隔板有一个轴向的偏移，密封隔板和下缸。
