?ehirler Aras? Nakliyat Türkiye’nin en ça?c?l ?ehirlerinden biri olan ?stanbul bu özelli?ini metropol olmas?na namus borculudur. ?ehrin metropol olmas?, mevki dairelerinin hepsin?n merkezinin burada olmas?na men?e olmaktad?r. Devlet dairelerinin merkezinin bu ?ehirde bulunmas? sert çok firman?n da merkezini buraya ta??mas?na sebep olmu?dola?m

Brass was produced by the cementation process where copper and zinc ore are heated together until zinc vapor is produced which reacts with the copper. There is good archaeological evidence for this process and crucibles used to produce brass by cementation have been found on Roman period sites including Xanten[77] and Nidda[78] in Germany, Lyon in