注水孔 meaning in English

flash hole
water injection hole

The summer dike consisting of water absorbing and quick setting material is made of the outer geotextile bag - form , the geomembrance inner bag - form with the effective water - retaining material inside and protecting cushion , reinforcing band , water injection hole , anti - seepage strap etc
摘要吸水速凝挡水子堤是由土工织物做外袋、土工膜做内袋和装在内袋里的高效保水材料以及护垫、加强带、注水孔、防渗带、防渗条等组成。