Patent
CFS method (manhole upper repair) patent certificate
The CFS (Cutting and Fragmentation Simultaneously) method uses a button tip drum to secure the road surface
between the manhole road surface and the manhole housing. It is a method of crushing at the same time as cutting.
between the manhole road surface and the manhole housing. It is a method of crushing at the same time as cutting.
HTTA method (manhole lower part repair) patent certificate
HTTA(High Temperature Steam Injection Thermosetting Apparatus for Manhole Repairing and Reinforcing)
method is that It is a manhole repair and reinforcement method using a thermal curing device for high-temperature
steam injection, which does not require excavation.
method is that It is a manhole repair and reinforcement method using a thermal curing device for high-temperature
steam injection, which does not require excavation.
