bottom outlet短语¹⁴⁴⁹⁷²⁺² 基本例句 泄水底孔 The grouted concrete lining method is used in the diversion bottom outlet reconstruction project of Huanren dam. 桓仁大坝导流底孔改建混凝土衬砌，选用了压浆混凝土衬砌方法。 cnki Disc Bottom Outlet aperture diameter smaller than the diversion pipe, valves, pressure of the upper valve ring. 阀瓣底孔的孔径小于导流管的内径，阀瓣上部有压环。 ppmai