resources division and other directly overseen organizations including the steel business coordination department. the metal & mineral resources division supports and provides raw materials to basic industries, such as steel and electric power, that are essential to social infrastructures. the division...
coal , petroleum , or natural gas is burnt, its carbon is converted to carbon dioxide (co ) and other compounds of carbon. co is a heat-trapping greenhouse gas which causes global warming , which damages the environment and human health. since greenhouse gas emissions from the combustion of fossil fuels...
tyre pressure how to change windscreen wiper blades how to charge a car battery how to jump-start a car how to clean a car how to do an oil change on a motorcycle how to change a motorcycle tyre how to lubricate a motorcycle chain how to do a motorcycle safety check top stories find out about shell fuels...
lead screw. it is cut and welded after rolling with an ordinary thread rolling machine, and is produced by a three-axis thread rolling machine for steel pipes. the hollow lead screw has relatively high requirements and the product is more precise. it is likely that the ordinary lead screw machine will...