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由黑龙江省水利科学研究所开发的寒冷地区混凝土抗冻外加剂,最近通过了黑龙江省科委组织的技术鉴定。
The concrete antifreeze additive developed in cold area by Heilongjiang Institute of Hydraulic Research recently passed the technical appraisal organized by Heilongjiang Science and Technology Commission.