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still for framstellning of brenda, refractory formkroppar by forming and brenning of a mixture of magnesium oxide, chromium and a magnesiumsilikatrik addition of serpentine, talc and / or olivine
still for framstellning of brenda, refractory formkroppar by forming and brenning of a mixture of magnesium oxide, chromium and a magnesiumsilikatrik addition of serpentine, talc and / or olivine