welder performance qualification meaning in English

焊工操作资格

Surfacing procedure qualification and welder performance qualification for high pressure urea equipment
尿素高压设备堆焊工艺评定和焊工技能评定
Welding procedure qualification and welder performance qualification of cladding and internal for high pressure urea equipments
尿素高压设备衬里板及内件的焊接工艺评定和焊工技能评定
Welding procedure qualification and welder performance qualification of corrosion resistant stainless steel tube - tubesheet joints for high pressure urea equipments
尿素高压设备耐腐蚀不锈钢管子-管板的焊接工艺评定和焊工技能评定