FRP rectangle manhole cover
1. Anti-theft function: The cable trench cover cannot be opened from the outside without a special key. Hot-dip galvanizing: anti-rust, no maintenance and replacement.
2. Anti-displacement function: not only control the sinking, but also control the left and right displacement. Beautiful appearance: simple lines, silver appearance, modern trend.
3. Anti-noise function: no matter how many years, there will be no noise after the wheel rolls. Drainage: The leakage area is 83.3%, which is more than twice that of cast iron.
4. Automatic adjustment function: commonly known as anti-caking manhole cover automatic adjustment, the height of the manhole cover can be automatically adjusted according to the pressure of the composite cable trench cover. Anti-theft design: The cover is hinged to the frame, anti-theft and easy to open.
5. Anti-sinking function: The design of the composite cable trench cover is cleverly connected, so that the force is evenly distributed on the entire road surface, and the downward pressure is well resolved. Specifications: Meet the requirements of different environments, loads, spans, sizes and shapes.