短語詞組短語fold facing line 繙折線fold -line pre-tensioned pre-stressed beam 折線先張預(yù)應(yīng)力梁the fold -line pre-tension pre-stressed beam 折線形先張法預(yù)應(yīng)力混凝土fold line dam axis 折線型垻軸線Fold line along angle 對角折線法 返回 fold line