Analyze the colony difference of high school teachers' burnout, validity the JD-R model and discuss the adjusting role of teachers' professional self-concept are the primary purpose of this study.

The utility model is characterized in that the self locking type air spring has the functions of supporting and adjusting height, and the operation is flexible and the structure is relatively simple.

Based on the theory of horizontal pendulum, the theoretical function model of magnetic error of self adjusting level is deriveted, and observation equation in geomagnetic field is set up.