Every element on the screen that has no direct semantic or obvious structural character can be misunderstood as a navigational control.
屏幕上的每一个元素并没有直接或明显的结构性特征，都有可能被误解为导航控制。
The structural design, design parameters, material chosen and manufacture process of multi-pinhole compound die of main printed circuit board for large screen color TV are introduced.
介绍大屏幕彩色电视机主印制板多小孔复合模的模具结构、设计参数、材料的选用和制造工艺等。
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