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Explanation: actually it's a boondoggle, as literally it would be a mixer (unsorter)but for the sake of arguement I would have to agree with Sorter written elsewhere here.
Sort of a bastard term translated from some other language
zaphod Local time: 18:41 Native speaker of: English, French PRO pts in pair: 440
Explanation: I went looking for something that would fit with the materials being handled, as well as the equipement being used (keeping in mind that one *sifts* such materials as gravel) and sure enough, I found a whole product list of *screeners*! For links to descriptions and photos of all sorts of screeners (centrifugal screeners, vibratory screeners) and other separators, sifters and sieves, see this URL: