Inventions
Insulation system of seal pouring machine in 2018
Insulation system of seal pouring machine in 2018
A pouring transfer system for seals
A mixed pouring backflow control system for seals
Seal element Patent Registered in 2001
Pipe test seal ring in 2011
Sealing element with clearance certificate in 2002
Lip seal ring for large shield machine 2013
Hydraulic press seal ring utility model Patent certificate in 2018
Hydraulic press seal element Utility Model Patent certificate in 2018
Rail-defect detector car –water film certificate in 2018
Seal ring for shield machine in 2018
