Public domain mirrored here
Wikisource transcription, proofread against a scan (ProofreadPage quality {4: 5}). Text read at https://en.wikisource.org/wiki/Sheet_metal_drafting?oldid=15663973. This work is in the public domain in the United States because it was published before January 1, 1931. The longest-living author of this work died in 1927, so
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