Steel structure optimization and checking: Secondary design and analysis of Complex structure;
节点设计与分析：电厂、化工厂、大跨度空间结构的节点计算与分析；
The service design is usually a secondary activity, although it is sometimes done in parallel.
服务设计常常是次要的活动，尽管有时候并行地完成。
Therefore, for art and design secondary education, research teaching assistant teaching of more practical significance.
因此，对于艺术设计中学教育来说，研究电教化辅助教学更具现实意义。
Then, the design and manufacture of a set of secondary source are finished.
引入次级声场的理论推导并完成了引入次级声场装置的设计、制造。
Then, the design and manufacture of a set of secondary source are finished.
引入次级声场的理论推导并完成了引入次级声场装置的设计、制造。
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