狗万·体育新闻

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                • 鍍鋅圓鋼

                  鍍鋅圓鋼其實就是兩邊頭是圓形的長條形的圓鋼的表面鍍了一層鋅,其規格型號以直徑的毫米數表明。鍍鋅圓鋼的優勢:1、外觀不同,圓鋼外觀光圓,無紋無肋,其余鋼筋表層外觀有刻紋或現在聯系

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