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
