短語詞組短語field intensity coverage 場(chǎng)強(qiáng)覆蓋field book coverage 視場(chǎng)extended defect field coverage 擴(kuò)展的視野radio field coverage 無線場(chǎng)強(qiáng)覆蓋Fixed Field Coverage and Drainages 固定廂溝coverage field 射野范圍 返回 field coverage