7Tusek J,Umek-l,Baicer B. Weld-cost saving accomplished by replacing s'mgle-wire submerged arc welding with triple-wire welding [J]. Science and Technology of Welding and Joining,2005,10(1):15-22.
8Bajcer B, Hrzenjak M,Pompe K.,et al. Improvement of energy acid materials efficiencies by introducing multiple wire welding [J]. METALURGDA, 2007, 46 (1): 47-52.