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| Keywords: Paraformaldehyde.png chemical structure<br /> DE Paraformaldehyd Polyoxymethylen Paraform p-Formaldehyd EN Polyoxymethylene acetal resin polytrioxane polyformaldehyde paraformaldehyde obecný vzorec takového polymeru own 2006-03-11 Velandur granted Polyoxymethylene svg Polyethers | ||||
