Welcome to Botou Guangtai Precision Casting Factory
Waterproof manhole cover is thin square frame with thin and light round manhole cover. You can fix the manhole cover through the hole with the frame.And you can adjust the characters from manhole cover with the frame. Typical Applications--- drain manhole cover Rain manhole cover Water manhole cover Drainage manhole cover Sewer manhole cover
Key words : manhole cover gully grate round manhole cover square manhole cover Tree grates Water meter box Cast iron pig flooring Balance weight
