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Long-length GdBCO coated conductors (CCs) possessing high critical current at 77 K in self field up to ~800 A/cm-width are being produced via a reactive co-evaporation deposition and reaction (RCE-DR) process by SuNAM Co.in Korea.Due to a very high conversion rate from an amorphous precursor film into the GdBCO film,an overall processing speed for producing the GdBCO film is faster than 120 m/h [J.H.Lee et al.,Supercond.Sci.Technol.27 (2014) 044018].