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为了加强DFS----V数字地震仪的使用、管理和维修保养,进一步讨论和制定地震仪器发展方向,石油部委托物探局于1985年9月5日至9月8日在河北省
In order to strengthen the use, management and maintenance of the DFS ---- V digital seismograph and further discuss and formulate the development direction of the seismic instruments, the Ministry of Petroleum entrusted the Bureau of Geophysical Prospectation with the Geophysical Survey Bureau of Hebei Province from September 5 to September 8, 1985