This us map comes with 100 LED pins; push them into the map's foamy surface to make contact with the electrical layers below.
这张美国地图带有100个LED图钉；将他们按入地图的泡沫表面，就能与下面的电子层接通。
Suitable sizes of push-back pins may be selected from a standard ejector pin range.
回程杆的合适尺寸可以在标准的顶杆范围内选择。
Suitable sizes of push-back pins may be selected from a standard ejector pin range.
回程杆的合适尺寸可以在标准的顶杆范围内选择。
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