Author: Clark, Harold Hayward
Title: An Investigation of Explosion-proof Motors
Description: Washington, 1912. orig.wrappers. 24x15cm, 44,(6) pp. Series: U.S. Department of the Interior, Bureau of Mines, Bulletin 46.. 6pp photoplates.. Rubberstamp to cover. Minor rubbing. Good.

Keywords: Explosion-proof Motors, Coal Mines Mining, Electric Motor, Engineering, Technology, , , ,