: What is the main reason for carrying out a Welding Procedure Qualification Test ?
亯 : ϴ 䱸 ϴ Ư Ʈ ִ ֱ ̰,
: What is the main reason for carrying out a Welder Qualification Test?
亯 : ѿ 䱸 Ȯϰ Ǵ õ ħ ɷ Ȯϱ Ͽ Ѵ.