| Subject | English | Bulgarian |
| environ. | rubber processing The systematic series of actions in which a solid substance deriving from rubber trees and plants is toughened and treated chemically to give it the strength, elasticity, resistance and other qualities needed for the manufacture of products such as erasers, elastic bands, water hoses, electrical insulation and tires | преработка на каучук |
| environ. | rubber processing industry | каучуково-преработваща промишленост (Сектор от икономиката, в който търговските предприятия произвеждат и продават естествени или синтетични каучукови продуки) |