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A three-phase composite sphere model is presented for the prediction of Youngs modulus of concrete.
提出了混凝土杨氏模量预测的 三相 复合球模型.
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加工的内容包括: 刷胶 、 粘书签带 、 贴纱布、贴堵头布,贴书脊纸.
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A few minutes after take-off, the pilot radioed that a fire had broken out.
起飞几分钟后,飞行员用无线电报告说飞机内突然起火。
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