11. Personal eye protection - automatic welding filters ; german version en 379 : 2003 12. All position automatic welding of pipe one - side welding with back formation 13. Semi - automatic welding 14. Automatic welding shop15. The - state - of - art of production and application of solid welding wire for carbon steel automatic welding 16. Bearing housings welded to the tube by precision self centering automatic welding machines 17. Lots of controlling indications are designed inside . it is convenient for automatic welding and robot welding 18. 407 we can perform the pipe by following operations : cutting and mechanical chamfering , manual and automatic welding 19. 407 we can perform the pipe by following operations : cutting and mechanical chamfering , manual and automatic welding 20. Application of pipeline automatic welding and fully ultrasonic inspection technique in west to east gas transmission pipeline project
