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煤炭科学研究院唐山分院水力采煤所研制的6DZ型介质固液泵,在煤炭科学研究院主持下,聘请有关专家和工程技术人员进行了审议,于1985年12月通过技术鉴定。
6DZ type solid-liquid pump developed by Institute of Coal Research Tangshan Branch of Hydraulic Coal Mining, under the auspices of the Coal Science Institute, hired the relevant experts and engineering and technical personnel were reviewed in December 1985 passed the technical appraisal.