external prestressing-tendons
external prestressing-tendons
外部prestressing-tendons
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Vibration characteristics of external tendons used on external prestressing concrete beams are detailedly calculated. Also the tested vibration characteristics of railway concrete beams are presented.
详细计算了体外预应力混凝土梁中常用型号体外索的自振特性，介绍了铁路混凝土梁的实测自振频率。
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