Manhole Covers
Square series manhole cover
Original technology: Triple anti noise patented technology protection ensures safer and more environmentally friendly use of manhole covers.
Original technology: Double anti-theft patented technology protection, making the manhole cover safer after 30 million times of wheel rolling without damage or deformation. The manhole cover has the highest safety level and more than 50 processes are carefully checked.
Circular series manhole cover
Original technology: Triple anti noise patented technology protection ensures safer and more environmentally friendly use of manhole covers.
Original technology: Double anti-theft patented technology protection, making the manhole cover safer after 30 million times of wheel rolling
without damage or deformation. The manhole cover has the highest safety level and more than 50 processes are carefully checked.