“bottom hold-down”的概念、定义、翻译、参考文献-科学参考

单词	bottom hold-down
释义	bottom hold-down [`bäd·ǝm `hōl dau̇n] ^{PETROLEUM ENGINEERING} A device located at the lower end of a bottom-hole pump that anchors it in a well.
随便看	drawing program drawing timber drawknife draw mark drawn finish drawn glass draw piece drawplate drawpoint draw radius draw ring drawsheet draw slate draw works dream dredge dredge ship dredging dredging buoy D region dreikanter Drepanellacea Drepanellidae Drepanidae Dresbachian

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