Lines Used In Mechanical Print Reading

Lines Used In Mechanical Print Reading


This is the second lesson in the Mechanical Print Reading Course. This lesson explains the types of lines used in mechanical print reading and what they represent.

Module Objectives

  • Identify visible lines and hidden lines and what they represent.
  • Describe three uses for phantom lines.
  • Describe three different break lines and their function.
  • Recognize center, dimension, cutting plane, extension, section, and leader lines.


This course consists of four lessons. This lesson was designed to provide training for maintenance technicians, mechanics, electricians, and others requiring knowledge of mechanical print reading. The lessons in this course show and explain how to read and interpret various mechanical drawings.


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