A method of vapor degreasing workpieces using a refrigerated vapor degreasing system. The system has a tank for containing a bath of degreasing solvent, a heater for vaporizing the solvent, a primary solvent condenser, a secondary solvent condenser, and a single refrigeration unit which can be switched...http://www.google.com.tw/patents/US5894851?utm_source=gb-gplus-share專利 US5894851 - Refrigerated vapor degreasing method
