短语词组短语laminal flow 层流laminal area 包围面积laminal placentation [植]层状胎座式;薄层胎座式laminal filter 片状填料laminal calibration 层流校正laminal filler 片状填料laminal cribrosa 筛板laminal forceps 椎板钳scleral laminal 巩膜层间 返回 laminal