When moved back the flashboard to the sealed tape in the outlet, it will form a strong sealing strength and finally sealed because of the dielectric.

• 随着闸板的上升，贯通孔逐渐加大，至极限位置时，导流孔与管道孔相重合，此时阀门全开。问题补充：只翻译第一段也可以。十万火急！