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The vanadium-microalloying HRB400 aseismic ribbed bar has been developed by Chengde Iron and Steel Co.
介绍了承钢利用特有的钒资源优势研制生产抗震钢筋的过程。
youdao
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The vanadium-microalloying HRB400 aseismic ribbed bar has been developed by Chengde Iron and Steel Co.
介绍了承钢利用特有的钒资源优势研制生产抗震钢筋的过程。
youdao