ix Acknowledgments Reviewers The author and publisher wish to thank the following industry and teaching profes- sionals for their valuable input into the development of Geometric Dimensioning and Tolerancing. Karl Haapala Oregon State University Corvallis, Oregon Sevastian Irimie Mohawk College Hamilton, Ontario, Canada Edward Janecek Waukesha County Technical College Pewaukee, Wisconsin Brian Judycki Mohawk Valley Community College Utica, New York Steven E. Rochon Schoolcraft College Livonia, Michigan Sharon Rouse Mitchell Community College Statesville, North Carolina Alison Salome Sierra College Rocklin, California Joseph Sipitkowski Springfield Technical Community College Springfield, Massachusetts Special Acknowledgments The author and publisher would like to thank the following companies, organizations, and individuals for their contribution of resource material, images, or other support in the development of Geometric Dimensioning and Tolerancing. Engineering Drafting & Design, Inc. FLIR Systems, Inc. Hyster Company David L. King Siemens Digital Industries Software Wright Medical Technology Special thanks to Anthony J. Panozzo for his technical support and contributions to this edition. Model Illustrations Model views featured in illustrations in this text were created using Solid Edge, produced by Siemens Digital Industries Software.