The Construction Technology of 21M Span Pretensioning Prestressed Concrete Arched Roof Bar

  • 21M跨先张法预应力砼屋面拱板施工工艺

  • 互联网摘选 2025-01-19 23:46:43

    • 相关例句
    精确
    • 模糊
    • 词首
    • 词尾
    • 词义
    • 例句