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куарса биш бату бутлуур
бутлуур унтук үйлдвэр. бутлуур кундапур бату. Isobuten-Isopren-Kautschuk – Wikipedia. Isobuten-Isopren-Kautschuk, kurz auch Butylkautschuk (Kurzzeichen IIR, gelegentlich auch PIBI), ist ein Polymer aus der Gruppe der Synthesekautschuke.Er ist ein Copolymerisat von 95 bis 99 Mol-% Isobuten und 1–5 Mol-% Isopren.Die Vulkanisate des …
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