middle fan meaning in Chinese

海底扇中扇

From comprehensive analysis , the conclusion can be drawn that the favorable reservoir of the upper part of the forth member of shahejie formation of bonan sag is the outer fan sandbody of fan delta near the y159 of the eastern part of the sag , the middle fan and outer fan of y160 , midian fan and distal fan of proximal turbidite and slump turbidite
综合分析认为，有利储集相带为洼陷东部深洼区附近的义159井区扇三角洲扇端砂体、义160井区扇三角洲的扇中及扇端砂体、近岸浊积扇及滑塌浊积扇的中扇及外扇砂体。