Linked from
The 32 pages that link to Metallurgy, each with the reason it gives.
SolderingNarrower topic: Soldering grew from broader practices of working and joining metals.
SmeltingNarrower topic: Smelting is one stage within the broader practice of metallurgy.
BrazingNarrower topic: Brazing developed within the broader history of working and joining metals.
DonetskNarrower topic: Steel production became a defining industry of Donetsk.
NovokuznetskNarrower topic: The city’s industrial identity centers on large-scale metal production.