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上海704所液压室为第二汽车制造厂研制的在线数显滤器压差发讯装置于1990年12月通过验收。该装置适用于各类液压系统的粗、精滤器,耐压31.5MPa,压差显示精度1.5％,压差可在给定范围内任意设定。有三档发讯位置,
Shanghai 704 hydraulic chamber for the second automobile manufacturer developed on-line digital filter differential pressure signaling device in December 1990 passed the acceptance. The device is suitable for various types of crude hydraulic system, fine filter, pressure 31.5MPa, pressure differential display accuracy of 1.5%, the pressure can be arbitrarily set within the given range. There are three files sent the location,