Because of its defence industries, Yekaterinburg was a closed city for much of the Soviet era. 由于叶卡特琳堡的国防工业是其一大特色，因此在苏联时期的大半岁月中该城与外界接触寥寥。
Globalization is impacting integration of western defense industry, and two major defense industry systems have been formed in the US and Europe. 摘要全球化正影响全球国防工业体系布局，使全球国防工业整合成美国和欧洲两大系统。
