Oil drain hole 回油孔 ; 放油口 ; 放油孔 ; 排油孔
drain hole drilling 泄油孔钻井
drain hole completion 泄油孔完井
water drain hole 排水孔
foundation drain hole 基础排水孔
drain hole cap 排水孔盖
case drain hole 箱体排油孔
solution-drain hole 溶液排放孔
At the bottom there is a drain hole edged with a brass eyelet.
在底部有一个镶了黄铜小孔的排水孔。
Study on parameter of composite element method for modeling drain hole in seepage analysis;
基于变分原理，研究渗流分析中模拟排水孔和不连续面的复合单元法。
The effect of the drain hole on drainage and seepage pressure lowering is quantitatively studied with an engineering example.
定量地研究了排水孔孔径、孔深等因素对降低坝基渗透压力和排除坝基渗透水流的作用。
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