表孔闸门布置在大坝的上部，承担汛期时的抗洪防汛任务。

Shows the hole strobe arranged in dam upside, undertakes flood prevention duty during the flood season flood-fighting.

youdao

表孔闸门布置在大坝的上部，承担汛期时的抗洪防汛任务。

Shows the hole strobe arranged in dam upside, undertakes flood prevention duty during the flood season flood-fighting.

youdao