The so called ‘Zhangqi’ in the Huainanzi possibly also refers to miasma.

Through comparison with constant power of voltage,the merits of the constant power of current were explained,moreover the electrical breakdowns that frequently happened in operating and reasons to take shape were analyzed.

This text introduces category and reason of electrical breakdown, deals with the methods of checking up the power supply, electric circuit and equipment and gives out some concrete countermeasures.

Study of analyzing mark evidence of electrical failure on automobile fire;

It introduces the important factors resulting in more than thirty casualties in a fire because of wrong operation and electrical failure.

System analytic method of electric fault diagnosis;

By maintenance of several years to Automatic welding machine MZ-1-1000,common electric fault cause and eliminating method are summarized in order to carry out correct maintenance and fast finish.