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...type blast cleaning machine [Images to demonstrate 'shot blasting' - see article] Manufacture: There are two methods of shot blasting: mechanical blasting, in which abrasive is propelled by means of a power-driven rapid rotating bladed wheel air blasting, in which the abrasive is propelled through a nozzle by compressed air (mechanical blasting is more widely used) In...

...type and thickness, wire size, dielectric type and flow rate, but 650 mm h-1 is typical. Cutting speeds of 20 mm s-1 are possible with thin materials. Dielectric is usually deionised water, although plain water, oil or air are sometimes used. Many machines have their own ion exchange unit. The dielectric is often pressure-fed through the wire guides to form a “column”...

...types of hammer used for open die forging: [Diagrams to demonstrate Hot Forging (open die) - see article] Open die forging between flat dies: [Diagrams to demonstrate Hot Forging (open die) - see article] Open die forging between flat narrow dies: [Diagrams to demonstrate Hot Forging (open die) - see article] Manufacture:​ There are a wide variety of open die hot...

...type of electromagnetic radiation are related by the simple equation: wavelength x frequency = speed of light, about 300,000 km/s. This recognition of light as a wave phenomenon had in fact overturned two centuries of belief, dating back to work by Isaac Newton, that light was composed of a stream of particles. However, light had one more surprise in store. The theory of...