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method for foundry sand coating with liquid novolac resin yemen

a resin coated sand consisting essentially of a particles of sand coated with from about 1 to 8 by weight of the sand of phenolformaldehyde novolak resin b a curing agent and c from about 1 to about 5 by weight of the phenylformaldehyde movolak resin of a urea compound the sands are especially useful for forming foundry cores and molds... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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