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本文提出了一类新的区组设计──并元设计，给出了并元加集的概念，研究了并元设计、并元加集、并元码之间的关系，为研究并元码提供了新的方法．
In this paper, we propose a new class of block design-parallel design, and give the concept of parallel addition and set, and study the relationship between the parallel design and the meta-set and the meta-code. Provide a new way.