W. T. (William T.) Lewis
Friction, Lubrication and the Lubricants in Horology
W. T. (William T.) Lewis · 2011
Public domain, Project Gutenberg. No sign-up.
Clock and watch makingFrictionLubrication and lubricants
W. T. (William T.) Lewis · 2011
Public domain, Project Gutenberg. No sign-up.