A Treatise on Coal Mining: Supplementary Volume; Percussive and Rotary Boring, Compressed-Air Coal-Cutting Machinery, Dynamos and Motors, Electric ... and Lighting, Electric Coal-Cutting Machinery

Supplementary

by International Correspondence Schools

Hardcover

ISBN: 978-0-365-51642-2

ISBN-10: 0-365-51642-2

Forgotten Books · 2019
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2019PaperbackA Treatise on Coal Mining: Supplementary Volume; Percussive and Rotary Boring, Compressed-Air Coal-Cutting Machinery, Dynamos and Motors, Electric ... and Lighting, Electric Coal-Cutting Machinery