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由冶金部自动化研究所和冶金部钢铁研研总院共同研制成功的光栅式辊缝仪，是用于冷轧机液压压下辊缝值自动检测的精密光
By the Ministry of Metallurgical Institute of Automation and Metallurgical Institute of Iron and Steel Research Institute jointly developed a successful grating gouging device is used for cold rolling machine hydraulic pressure roll gap automatic detection of precision light