Automotive maintenance, lathe CNC, electromechanical maintenance, medical equipment maintenance which professional good income?

We graduated from junior college a few students, automotive maintenance and lathe CNC have, after graduation into the factory, basically are more assembly line work, not much gold Dry more than a year to change a factory, this year home to know that a classmate graduated from college to follow his uncle to enroll in that much to learn the medical equipment maintenance class, and now just come out to work than we have worked for two years of wages are still higher than sitting in the office! Unlike us to stay in the factory are not much to look forward to.