Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials 金屬表面酸洗劑焊粉或焊膏(金屬及其他材料制成的焊粉或焊膏),
Fluxes and other auxiliary preparations for soldering, brazing or welding; preparations of a kind used as cores or coatings for welding electrodes orrods 焊接用的焊劑及其他輔助劑等(包括作焊條芯子或焊條塗料用的制品),
