The specific classification criteria for each health or. physical hazard class identified in the HCS enables manufacturers, importers, and others. performing hazard classification to collect and evaluate the available data to determine if the. chemical is hazardous and identify the associated level of severity.
Ancient Transportation. The first form of transport was, of course, Shanks pony (the human foot!). However people eventually learned to use animals for transport. Donkeys and horses were probably domesticated between 4,000 and 3,000 BC (obviously the exact date is not known).ncient Transportation. The first form of transport was, of course, Shanks pony (the human foot!). However people eventually learned to use animals for transport. Donkeys and horses were probably domesticated between 4,000 and 3,000 BC (obviously the exact date is not known).
Tank Development. Richard Edgeworth invented the Caterpillar track in 1770. In the Crimean War a small number of steam powered tractors based on this design proved very successful in the muddy terrain. The development of the modern tank remained dormant until the arrival of the internal combustion engine, patented by Gottlieb Daimler in 1885. In the United States the Holt Company built a tractor with caterpillar tracks that was used to move over difficult territory. Although it was suggested that this machine might be adapted for military use, those in positions of authority failed to see the significance of this new development.