​A combined drilling special machine tool patent

A patent for a combined bridge truss structure assembly rotating frame

Assembled structure patent

Patent for scaled chain grate

​Patent for internal combustion coal-fired heating furnace with movable grate

​Patent for hydraulically driven inclined reciprocating grate

​Patent for arch furnace arch of coal-fired heating furnace

Patent for rear axle cooling grate

Patent for internal combustion coal-fired heating furnace