注水井    downflow well

下滑运动    downglide motion

俯冲；下行的    downgoing

下行体波    downgoing body wave

下行波    downgoing event

下行层间多次波    downgoing intrabed multiple

下沉板块    downgoing plate

下行P-SV波    downgoing P-SV-wave

下行P波    downgoing P-wave

下行反射    downgoing reflection

下行地震同相轴    downgoing seismic event

下行切变波    downgoing shear event

下行信号    downgoing signal

下行地下层间多次波    downgoing subsurface intrabed multiple

下行时间    downgoing time

下行旅行路径    downgoing travel path

下行波减去法    downgoing wave subtraction

下行波前    downgoing wavefront

下行子波    downgoing wavelet

沿坡向下    downhill

减小方向    downhill direction

下坡管线    downhill pipe line

井下回流阀    downhole back flow valve

井下防喷器    downhole blow-out preventer

井下燃烧器    downhole burner

井下刻度    downhole calibration

井下照相机    downhole camera

井底集聚室    down-hole chamber

井下完井装置    downhole completion equipment

井下组件    downhole component

井底条件    downhole condition

井下可控弯接头    downhole controllable-angle bent sub

井下资料收集    downhole data acquisition

井下稀释    down-hole dilution

井下动力仪    downhole dynamometer

井底电加热器    downhole electric heater

井下乳化法    downhole emulsification process

井下引擎    downhole engine

水力活塞泵    downhole engine pump

井下钻具    down-hole equipment

井下冲蚀    downhole erosion

井下流量调节器    downhole flow regulator