万能蜂窝底板，活动顶针活动支撑块，灵活定位P CB，方便印刷双面pcb。
Beehive bottom board, thimbles move support board, agile orientate PCB, easy to print dual sides PCB.
在支撑臂定位座的上壁顶口处对应支撑臂的滑动槽设置凸形滑动块；
The location slider of the support arm is cooperated to the sliding-groove of the sliding column to form to sliding mechanism.
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