1. Electric furnace automatic gunning machine                    
Patent No. ZL200620094127.5       

2. Spray gun pitch devices of Electric furnace automatic gunning machine  
Patent No. ZL200620094131.1

3. Electric furnace auto gunning machine lift device                
Patent No  ZL200620094130.7

4. Cross arm expansion device of electric furnace auto gunning machine
Patent No.ZL200620094128.x

5. Spray gun Rotary device of electric furnace auto-gunning machine   
Patent No.ZL200620094129.4

6. Disc feeder of furnace flame weld machine                      
Patent No.ZL200620092204.3

7. Spray gun of furnace flame weld machine                       
Patent No.ZL200620092203.9

8. One portable screw pump mortar spray machine                  
Patent No.ZL200720010279.7

9. Converter movable type gunning machine                       
Patent No.ZL200620168669.2

10. Flame weld machine of Industry kiln furnace                    
Patent No.ZL200610047274.1

11. Electric auto-furnace weld machine                            
Patent No.ZL200610134274.5

12. One cylinder type gunning machine with stable charging system     
Patent No.ZL200720010280.x

13. Portable No-oil low noise air compressor                       
Patent No.ZL200720011748.7

14. One double plunger type mortar spraying machine                
Patent No.ZL200720011506.8

15. Portable No0oil low noise air compressor                       
Patent No.200710011016.2

16. Converter movable gunning machine                           
Patent No.200610135135.4

17. Single spraying gun RH refining furnace soaking pipe gunning machine
Patent No.200810011262.2

18. Single spraying gun RH refining furnace soaking pipe gunning machine
Patent No.ZL200820012512.x

19. Double spraying gun RH refining furnace soaking pipe gunning machine
Patent No.ZL200810011261.8

20. Double spraying gun RH refining furnace soaking pipe gunning machine
Patent No.ZL200820012511.5