--Metal annular flexible hose
--Metal helix flexible hose
--Metal expansion joint
--Rubber expansion joint
--Big valve, flange and tube couplings
--Hydraulic annular hose forming machine
--Mechanical annular hose forming machine
--Helix hose forming machine
--braiding machine
--Mechanical expansion joint forming machine (top in the world)
--Hydraulic expansion joint forming machine
--Tube mill
--Seam welder
--Shear machine