借助于一个调试角度小工具可以将其直接安装在建筑物的墙壁或顶棚，不需要其他任何辅助安装备件。
It can be mounted on walls or ceilings without special mounting hardware and requires only a single tool for all adjustments.
借助于一个调试角度小工具可以将其直接安装在建筑物的墙壁或顶棚，不需要其他任何辅助安装备件。
It can be mounted on walls or ceilings without special mounting hardware and requires only a single tool for all adjustments.
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