plate to plate butt welding test blocks | k, t, y test blocks | non destructive testing training and assessment test blocks-九游会登录
1. plate butt welding test block 2, t butt welding weld block 3, tube butt welding weld block 4, tube butt welding weld block 5, k, t, y test block 6, forging type comparison block 7, plate type comparison block