Trichloroethylene is a kind of excellent solvent. TCE can substitute for benzene and gasoline. To be used as cleaning for metal parts and electronic components in such industries as color television, refrigerator, automobile, air-condition precision-machine, micro-electronics. And also be used as degreasing of metal, extracting agent of oil, fat and olefin, pesticide, ataractic, organic synthesizing intermediate, etc. In heat exchanger factories, trichloro ethylene, as important degreasing agents are widely applied in cleaning fins, bars, parting plates, tanks and other heat exchanger parts. After these heat exchanger parts with oil stain are soaked in the solution of trichloroethylene and cleaned by supersonic, these metal material will be very clean which also ensure heat exchanger with good brazing quality.