短語詞組短語spatial beam string structure 空間張弦梁single beam string structure 單榀張弦梁結構foundation beam plate structure 基礎梁板beam member structure 梁桿結構prestressed beam string structure 預應力張弦梁beam leaded structure [電子]梁式引線結構plate beam combined structure 板梁組合結構Radiant Beam String Structure 輻射式張弦梁結構timber beam string structure 張弦木梁 返回 beam structure