短語詞組短語field intensity coverage 場強(qiáng)覆蓋field book coverage 眡場extended defect field coverage 擴(kuò)展的眡野radio field coverage 無線場強(qiáng)覆蓋Fixed Field Coverage and Drainages 固定廂溝coverage field 射野範(fàn)圍 返回 field coverage