基于现有规范小曲率半径U形预应力筋张拉伸长量缺乏陈述，而该类预应力筋实测伸长值和理论伸长值偏差过大。
Little has been presented about the existing small curvature radius U-shaped prestressed tendon, whose practical elongation value and theoretical stretching elongation deviate greatly from each other.
基于现有规范小曲率半径U形预应力筋张拉伸长量缺乏陈述，而该类预应力筋实测伸长值和理论伸长值偏差过大。
Little has been presented about the existing small curvature radius U-shaped prestressed tendon, whose practical elongation value and theoretical stretching elongation deviate greatly from each other.
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