Qualification test of welders - fusion welding for steels 钢熔化焊焊工技能评定
2.
Qualification test of welding operators 焊接操作工技能评定
3.
Reliability and validity of adaptive skill rating scale for children 学龄期儿童适应技能评定量表的信度和效度研究
4.
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
5.
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
6.
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
