1. Initial movement of the valve stem in the opening direction unseats the pilot valve.
当阀杆向开启方向移动，首先使先导阀脱离阀座。
1. \u0039\u0031\u0031\u67E5\u8BE2\u00B7\u82F1\u8BED\u5355\u8BCD
1. She unseats Disney's Anne Sweeney, who held the top spot for two years.