亚洲中文字幕国产综合_96国产精品日韩国产在线_亚洲色中文字幕无码av_亚洲Av无码一区二区波多野

The open rod type copper inlaid cast iron square gate is mainly used for irrigation and flood control. Water supply and drainage projects such as water conservancy and hydropower, sewage treatment plants and water works are used to cut off or dredge water flow.
The gate adopts the open rod type, the plane reinforced type, and the wall-mounted type. It is suitable for the rising rod type square orifice gate installed on the wall. Its flat inner bottom is closely attached to the parallel wall. The opening and closing nut is driven to rotate, and the screw rod drives the gate body to run up and down under the action of the trapezoidal thread, so as to cut off or dredge the water flow.