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由张家口市科学技术委员会于1986年9月23日主持召开了张家口市化工原料厂生产的铁路客车专用清洗剂市级技术鉴定会。参加会议的有张家口市标准计量局、沈阳铁路
By Zhangjiakou City Science and Technology Commission on September 23, 1986 presided over the Zhangjiakou City Chemical raw materials factory production of railway passenger car cleaner municipal technical appraisal. Attended the meeting are Zhangjiakou City Bureau of Standards and Measurement, Shenyang Railway