welder qualification/ welder qualified certification
相关英语词汇推荐
- tinplate mill
- flash plating
- blind riser
- shot well
- arc welding with consumable
- waist
- cement pattern
- superduty silica brick
- filling
- annealing ore
- drawn in scale
- congruent melting point
- Radiation damage to the crystal
- aluminizing
- laminate composite
- vacuum(-pan) evaporator
- stiffener
- residual magnetism
- cathode efficiency
- scaffold bridging