extraction fan抽风机,抽气风扇extractionn.抽出；拔出；抽出物；血统extraction steam pressure loss抽汽压损extraction-spectrophotomitry萃取光度法extraction distillation column萃取蒸馏塔extraction oi the contour line轮廓线提取extraction of depth information深度信息提取Extraction of land-use change变化信息提取extraction backpressure turbine抽汽背压汽轮机Extraction with organic solvent有机溶剂萃取Extraction of Tatal Ocularglobe眼生素, 牛眼注射液, 眼明, 眼清, 眼宁, 增光灵extraction-photometric method提取光度法