Charles GillisCharles Gillis has 30 years of mechanical design
experience, previously serving as a machine design engineer for The Gillette
Company. He has been training engineers in blueprint reading, geometric
dimensioning & tolerancing, and relaed topics for 15 years. He is also a
contributing author to the renowned Machinery's Handbook, 32nd edition,
as well as the Machine Designer's Reference, both published by
Industrial Press.