| 摘要 |
PURPOSE: A protective case for a sluice valve is provided to simply make the top surface of a manhole cover and the ground identical after construction. CONSTITUTION: A protective case for a sluice valve comprises a first body(110), a second body(120), and a support body(130). The first body is coupled to the top of a mortar structure. The second body is installed on the top of the first body and is rotated. The support body is installed on the top of the second body, and a manhole cover(131) covers the top end thereof. |
