The similar material research status is introduced; the principle of selecting and compounding also is analyzed.

在调研相似材料研究现状的基础上，分析相似材料选择与组合的原则。

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The similar material research status is introduced; the principle of selecting and compounding also is analyzed.

在调研相似材料研究现状的基础上，分析相似材料选择与组合的原则。

youdao