… Pickling preparations for metal surfaces; fluxes and other auxiliary preparations for soldering, brazing or …
Explanatory notes
… 38.10 ‑ Pickling preparations for metal surfaces; fluxes and other auxiliary preparations for soldering, brazing or … a basis of alkalis (e.g., sodium hydroxide). The heading does not include cleaning preparations for metals ( … various metallic oxides (e.g., iron oxide) used as intense heat‑generators (alumino‑thermic process) in welding …