Tool Sharpening is very broad on its own. A knife, a block plane, a crosscut saw all need to be sharpened, however not in the same manner.
Distilling makes spirits, solvents, oils, fuel.
Weaving makes cloth, nets, cheese cloth.
A Blacksmith makes rods, bar, chain, wire, hinges, spikes, nails, tools, and components of larger implements.
A cooper makes barrels, casks, tubs, buckets.
Etc. Specialized yes. However there is a broad range in those specializations.
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