With the constant improvement of people's living standard, the number of cars
but became a manhole grow with each passing day, security key, the cast iron
covers came into being, bearing capacity of cast iron manhole covers more than
ordinary covers, selection of material, quality has a unique anti ring,
anti-theft, anti falling and anti jump, slipproof.
Cast iron manhole cover, manhole cover now accurate ductile iron covers, because good material good pressure resistance, high load, widely used in municipal roads, highways, communications, electricity, tap water, and other school district, park. Especially near the airport, high-speed, heavy load of these occasions, must cast iron covers the application of metallic materials. Ink: suitable for cast iron manhole cover set in the municipal road, highway, communication, electricity, tap water, and other school district, park. Glass steel covers: mainly used for municipal roads, water supply, power supply, telecommunications, lighting, residential area, landscape planning, oil and gas production, chemical production, sanitation and other projects, drain cover. Steel fibre concrete manhole: widely applicable for municipal engineering, construction engineering, public engineering, garden and all necessary ground, pavement drainage, drainage area and area.
Now covers not only effectively solve the road safety, more become an art graffiti covers become an entertainment art college students, overseas already appear graffiti covers, appearance has a unique artistic effect, more safety protection function.