Http://www.internationalfreight.com.au/wp-content/uploads/cargoload-300x222.jpgBulk cargo constitutes virtually all tonnage carried by most freight railroads. Bulk cargo is commodity cargo that is transported unpackaged in significant portions. Several different electrification and signaling devices is in use, even though this is less of a problem for freight; having said that, overhe... https://warrenb221sis6.wikikali.com/user