Plural of fettling; multiple instances of the fettling process or scraps of metal removed during fettling.
Plural form of the gerund 'fettling,' from Old English 'fetel.' In foundries, 'fettlings' specifically referred to the waste metal and filings removed from castings.
Factory fettlings weren't wasted—foundries would carefully collect and recycle all those metal shavings, making early industrial recycling a practical economic necessity!
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