Predominating the design system does the work that production need cures to have, and draw to design the spare parts diagram, processing the diagram, assembling diagram.
主导设计制做生产所需工治具，并绘制设计零件图，加工图，组装图。
The parallel combination fragment element needs to be used when creating a sequence diagram that shows parallel processing activities.
当创造一个序列图，显示并行处理活动的时候，需要使用并行组合碎片元件。
The transaction coordination diagram is used to show the constituents of a defined transaction, the order of processing (sequential vs. parallel), and nested transactions.
事务协调图用来显示确定的事务的构成、处理顺序（顺序的 vs. 并行的），及嵌套的事务。
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