求翻译：CASIC是中国最大的导弹武器装备制造商，是中央直接管理的国有特大型高科技企业，拥有5个元救援，2个研究生产基地，11个公司制、股份制企业，共计500余户企事业单位是什么意思？

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CASIC is the China biggest missile armament equipment manufacturer, is the central direct management state-owned extra large type high tech enterprise, has 5 Yuan rescues, 2 research production base, 11 corporate systems, stock-company type enterprise, total 500 household enterprises and institution

CASIC is China's largest manufacturer of missile weaponry, is a central direct management of large State-owned high-tech enterprise, has 5 rescue, 2 research and production bases, 11 companies, joint-stock enterprises, totaling more than 500 enterprises and households

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