This article mainly elaborated five questions:First, social life's essence is the practice.
本文主要论述了五个方面的题目：第一、社会生活的本质是实践。
The article mainly elaborated the general shield type hydraulic pressure support design process.
本论文主要阐述了一般掩护式液压支架的设计过程。
The article mainly elaborated the general shield type hydraulic pressure support design process.
本论文主要阐述了一般掩护式液压支架的设计过程。
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