File:Elctro-percussive welfing machine, Westinghouse Company, about 1915.jpg

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English: Elctro-percussive welfing machine, Westinghouse Company, about 1915
Date
Source Electric Welding, Ethan Viallm, McGRAW-HILL BOOK COMPANY, INC.1921
Author Unknown authorUnknown author

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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Elctro-percussive_welfing_machine,_Westinghouse_Company,_about_1915.jpg

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Elctro-percussive welfing machine, Westinghouse Company, about 1915

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current05:27, 24 August 2024Thumbnail for version as of 05:27, 24 August 2024800 × 1,200 (257 KB)BillzweigUploaded a work by {{Unknown|author}} from Electric Welding, Ethan Viallm, McGRAW-HILL BOOK COMPANY, INC.1921 with UploadWizard

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