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·­Ò룺With the development of science and technology, people have higher and higher requirements on metallic materials property.

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With science and technology developed, people require more on properties of metallic material.
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The requirements for the performance of metallic materials are at higher level as the development of science and technology.
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1) With the development of science and technology, the requirements on the metallic materials properties become higer and higher.
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With the development of science and technology, the requirements on the performance of metallic materials are increasingly higher.

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