coal gasification is the process of producing syngas–a mixture consisting primarily of carbon monoxide co , hydrogen h 2 , carbon dioxide co 2 , natural gas ch 4 , and water vapour h 2 o –from coal and water, air and/or oxygen. historically, coal was gasified to produce coal gas, also known as 'town gas'. coal gas is combustible and was used for municipal lighting, and heating, before the advent of large scale production of natural gas from oil wells.
the diamond tools used for grinding most commonly are diamond grinding cup wheels, and for polishing are usually diamond polishing pads. the use of diamond tooling is the most common type of abrasive used under concrete grinders and come in many grits that range from 6 grit to the high thousands, although 1800 grit is considered by the insurance industry as the highest shine to apply to a floor surface.
oxy-fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u.s. and oxy-fuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals. french engineers edmond fouché and charles picard became the first to develop oxygen- acetylene welding in 1903. pure oxygen .
chick grinding machine prior to the development of modern broiler meat breeds, most male chickens cockerels were slaughtered for meat, whereas females pullets would be kept for egg production. however, once the industry successfully bred separate meat and egg-producing hybrids—starting in the 1920s and 1930s 7 —there was no reason to keep males of the egg-producing hybrid.
accumulators are a common part of hydraulic machinery. their function is to store energy by using pressurized gas. one type is a tube with a floating piston. on the one side of the piston there is a charge of pressurized gas, and on the other side is the fluid. bladders are used in other designs. reservoirs store a system's fluid.