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Central Lock

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Central Lock

A named craft tool / part lemma (Central Lock) drawn as an exact public-domain workshop phrase.

Central Lock is historically related to Iron.
gunsmith-manual seats orphan central-lock beside iron as a first craft peer — object speech, not a text-container or tradition dump.
from J. P. Stelle & William B. Harrison · The Gunsmith's Manual, PD Gutenberg #71928
historically related to · sourced · documented

sources

The Gunsmith's Manual · J. P. Stelle & William B. Harrison
Stelle & Harrison, The Gunsmith's Manual (PD Gutenberg ed.).