| http://www.w3.org/ns/prov#value | - In Estonia, as the main trade groups, liquid refined petroleum products,crude oil and oil shale, nitrogen compounds and fertilizers (except natural fertilizers), coal andlignite, cement, lime and plaster, basic iron and steel and ferro-alloys and products of the firstprocessing of iron and steel (except tubes), basic mineral chemical products, stone, sand, gravel,clay, peat and other mining and qu
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