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三轴井下地震测量
triaxial borehole seismic survey
下井仪轴线
sonde axis
下行地震同相轴
downgoing seismic event
下部径向轴承传动接头
radial bearing lower drive sub
井下长轴传动泵
borehole shaft driven centrifugal pump
心轴型下井仪
mandrel type tool
轴线下拗
axial depression
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