VelocityViewServlet provides a convenient view layer for construction of Web-based UI based on templates.

VelocityViewServlet以模板为基础为基于 Web 的 UI 构造提供了方便的视图层。

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The whole structure of the system is three layer construction, the head connecting into layer, the center application layer and the database support layer of back-end.

系统的整体架构为三层结构，前端接入层、中间应用层和后端数据库支持层。

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One of reasons for it is that graduation of manganese sand is not rational, which leads to partial confusion of filter layer construction.

分析原因：工艺改造时所选的锰砂有部分粒径不符合要求，导致级配不合理，造成滤层结构部分混乱；

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The open-cage printer will work using "fused filament fabrication" with 1.75mm filament, and will also feature 100 micron layer resolution (0.1 millimeter), rigid aluminum construction, an open-source software tool chain and optional heated build platform.

ENGADGET