タイトルまたは説明

D**0 cast iron manhole cover for road construction. for heavy duty main road, and for pavement. Cast iron, it is a very strong material which with good performance and physical ability. With very good anti-rust ability if painted with black bitumen.
Generally speaking, D**0 can meet all basic needs, except for additional airports, terminals and other places.

Hing and lock can be installed to prevent other personnel from opening the manhole cover. The material of the manhole cover is nodular cast iron, which can be used for more than *0 years.