Values for array type components can contain zero or one element, and values for set and tree type components can have zero or more elements.
用于数组类型的组件的值可以包含0个或1个元素，用于集合和树类型的组件的值可以包含0到多个元素。
In this paper, the design principles and application of tools for machining fir-tree type slot are presented.
介绍了枞树型轮槽铣刀的设计原理及应用。
Combining with the development of computerized logging software, this paper introduces the storing and accessing of tree type data, and gives the complement in the logging data.
文章结合数控测井软件开发实际，详细介绍了树型数据的存储、访问以及在测井软件中测井数据组织中的应用。
By using the method, the digital multiplexer networks being designed can be simplified to minimal tree-type networks.
这种方法可以使待设计的数字多路选择器网络简化到最小树形网络。
It also proposes the pattern of tree-network structure of urban green space based on the advantage and flaw of tree-type structure and network-type structure.
结合树型结构和网络结构的自身优势与缺陷，提出了城市绿地树网型结构模式，并对城市绿地树网结构的特征、优势和研究方向提出了建议。
Tree-type structure decreases the speed of most modules, which makes design easier, and decreases the power consumption.
树型结构的使用降低了大部分电路的工作速率，从而简化了设计，也减小了芯片功耗。
Tree-type structure decreases the speed of most modules, which makes design easier, and decreases the power consumption.
树型结构的使用降低了大部分电路的工作速率，从而简化了设计，也减小了芯片功耗。
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