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一种适于江河近海中小型船舶助航及测深用的CSR—300型回声测深仪,日前在七二六研究所研制成功。该仪器采用了微机及CRT屏幕显示
A type of CSR-300 echosounder suitable for the navigation and sounding of small and medium-sized ships in rivers and seas has been successfully developed at the July 26th Research Institute. The instrument uses a microcomputer and CRT screen display