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...type and rigidity of work: LSG, 10–15 m s-1; surface 15–30 m s-1; cylindrical, 20-30 m s-1; internal, 20–60 m s-1. Cross-feeds depend on wheel width: roughing, 75–90% of wheel width rev-1; finishing, 10–25% of wheel width rev-1. Grinding ratios (volume of material removed/volume of wheel wear) depend on type of wheel, work speed, wheel speed, cross-feed,...

...type, spray and component material, spray rate, coating thickness, etc., as shown below. The substrate (component) temperature depends on the method used, but cooling (using CO2 or air) is sometimes needed to prevent damage. Powder flame process is most widely used, despite high operating costs and poor coating properties, due to its low capital cost, low operating noise...

...types of observations over several years. This impressive achievement promises a new way of finding the previously elusive class of isolated black holes. Einstein’s General Theory of Relativity predicted that massive objects will bend light as it travels past them. That means that any light passing very close to an invisible black hole – but not close enough to end up...