中国船舶工业总公司中南光学仪器厂是生产潜艇潜望镜的专业军工企业。改革十年来,生产逐年发展,经济效益不断提高。在1987、1988连续两年有较大幅度增长的基础上,1989年完成工业总产值、实现销售收入和实现积累分别比上年增长72.7%、77.6%和163.2%。在国家实行双紧方针,全国市场疲软的情况下,中南光学仪器厂能够取得这 China National Shipbuilding Corporation Zhongnan Optical Instrument Factory is a professional military enterprise that produces submarine periscopes. Over the past ten years since the reforms, production has developed year by year and the economic benefits have continuously improved. In 1987 and 1988, there was a significant increase in two consecutive years. In 1989, the total industrial output value, sales revenue, and accumulation achieved were respectively increased by 72.7%, 77.6%, and 163.2% over the previous year. With the implementation of the double-tightening policy in the country and the sluggish national market, South China Optical Instrument Factory can achieve this.