亚洲精品在线观看少妇,国产激情亚洲一区,国产人碰人摸人爱免费视频,久久国产精品一区二区,久久国产精品免费看,日韩欧美视频熟女,婷婷午夜电影在线观看,色婷婷国产麻豆精品,八年沉淀只做精品,国产在线视频专区,日韩欧美纯爱电视剧电影免费观看,亚洲国产日本免费观看,天堂亚洲欧美日韩一区二区,中文字幕有码系列在线观看,久久日韩精品一区,小明欧美精品视频在线观看,91av成人一区二区三区,欧美日韩亚洲综合在线一区二区,亚洲一区二区二三区日日骚,在线观看欧美一区二区三区精品,日本欧美黄色一级片,欧美av一区二区三区在线观看,91成人国产麻豆一区二区

Steel structure is damaged, why?

    Although the use of steel in the construction of a long life, but also a longer life span has been damaged when, specifically, for what reason? Following Dongguan Steel Company to share and share.
        1, components due to a variety of unexpected deformation, disability, distortion, depression, resulting in weakened cross-section components, rod warpage, connection cracking;
        (2) The bearing capacity of the structure is insufficient due to the change of load, overtime service, norm and procedure change;
        3, due to the corrosion of chemical substances and corrosion caused by electrochemical corrosion weakened the cross-section of steel structure;
        4, the temperature difference caused by the component or connection deformation, cracking and warping;
        5, some other design, production, production, construction errors caused.
        This is the steel structure of Dongguan today to share some small knowledge, more knowledge of the steel structure, and interested friends, please continue to follow our follow-up update!