@book{8519,
	author = {Coastal Training Technologies Corp.},
	title = {Perpendicularity and modifier application},
	publisher = {Coastal Training Technologies Corp.},
	address = {Virginia Beach, Va.:},
	note = {This presentation deals with perpendicularity. When you have completed this course you will be able to identify and interpret the methods of specifying perpendicularity and describe the applications of modifiers and how they may affect the specified orientation tolerances.  }
}