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由机械部北京自动化研究所液压中心主办的“液压油液清洁度检测学习班”第一期于1987年1月10～17日在京举办。参加这次学习班的有60个单位共66人。在学习班上首先介绍了当前我国油液清
The first phase of the “Hydraulic Fluid Cleanliness Testing Workshop” hosted by the Hydraulic Center of the Beijing Institute of Automation of the Ministry of Machinery was held in Beijing on January 10-17, 1987. There are 66 people in 60 units in this class. In the class first introduced the current Chinese oil Qing