drainage hole
短语词组
- height drainage drilling hole 高抽钻孔
- drainage e hole 放泄孔
- Continuous sewage drainage pipe hole 连续排污管口
- upward drainage hole 仰孔
- stopping the drainage hole 封孔
- exit flowing drainage hole 逸流型排水孔
- overflowing drainage hole 溢流型排水孔
- drainage of explosive hole 炮孔排水
- escape flow drainage hole 逸流型排水孔 返回 drainage hole