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buy ball mill slide rule in germany
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buy ball mill slide rule in germany

Later rules included some plastic rules made in the USA, and some Geroplast rules made by Faber-Castell in Germany. There are also several Dietzgen marked aluminum rules of unknown origin. The 1734 Microglide rule is the most famous Dietzgen rule, and incorporates a novel teflon slide bearing for smoother action.Jul 31, 2003 Slide rule collector Bob Otnes bought this particular Duplex for $17 in 1980. It is now worth at least $1,500. B. Before slide rules were used in engineering, their main function was to compute excise taxes. This 1720 gauging rule could compute the volume of wine or ale in a cask. It is made of boxwood, a very stable, hard, fine-grained wood. C.Jul 31, 2014 Wm Wi ( 80P 10 - 80F 10 ) (1) where Wm - is mill specific motor output power (kWh/t), Wi - is the Bond ball mill work index (kWh/t), P80 - is sieve size passing 80% of the mill product ( m), F80 - is sieve size passing 80% of the mill feed ( m), The efficiency factors (Rowland, 1975) modify equation 1 so that it caters for circuit ...

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