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由牡丹江石油机械仪表设备成套公司研制并生产的MJZ型机械式指重表,日前在辽河油田通过了省级鉴定。
By Mudanjiang Petroleum Machinery and equipment complete sets of equipment company developed and produced by MJZ-type mechanical Chronometer, recently in the Liaohe Oilfield passed the provincial appraisal.