The Teaching Method for Mechanical Drawing Lessons from the Perceptual to Rational Understanding

In order to improve the mechanical drawing courses teaching effectiveness,improve knowledge," the accumulation and deepening goes to the "rational understanding" of the dynamic leap,and "applied to practice "Understanding of the process to enable students to master the" two-dimensional plane view "and" three-dimensional three-dimensional"conversion approach each other skills,and the quality of teaching by the" quantity "to" qualitative change "of sublimation