According to the characteristic of transfer of magnetism and mechanical force, rare-earth permanent magnetic lifter was studied and designed.
利用磁与机械力的转换特性，进行了稀土永磁起重吊的研究和设计。
Analyse the causes of the roadbed freeze-harm, and expatiate on the characteristic of the moisture transfer during freezing.
分析路基冻害产生的原因，阐述路基冻结过程中水分迁移的特征。
The catalyst has high activity, selectivity and the characteristic of reaction controlled phase transfer catalyst.
该催化剂具有高活性、高选择性，且具有反应控制相转移催化剂的特性。
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