Recent developments in coal cleaning
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Lessing, R.
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Article
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1931
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Wiley (John Wiley & Sons)
β 513 KB
h t the considcriition of tlic p n t pro1)Icms witli which t,lic ,coal iiitliistry l t : ~ Iicen f i i d for sonic tinic, oiic fnctor :ippc.itrs not. to liiivc rcccivctl t l i n t iittctition \vhiclt its fitiid:inie~ttitl ccoiioitiic ini~iortnncc ciills for. It is iiti iinqiiestioticd fiict thit Iii