CHICAGO, March 30 (Reuters) - Heavy equipment maker Caterpillar Inc. on Wednesday unveiled new diesel engines that use exhaust filters and a new combustion process to help it meet more stringent federal emissions standards that take effect in 2007.
CHICAGO, March 30 (Reuters) - Heavy equipment maker Caterpillar Inc. on Wednesday unveiled new diesel engines that use exhaust filters and a new combustion process to help it meet more stringent federal emissions standards that take effect in 2007.