-
公开(公告)号:US07428782B1
公开(公告)日:2008-09-30
申请号:US11457154
申请日:2006-07-13
摘要: A plotting board includes a base; a top; a pivot that connects the top and the base, the top and the base being rotatable and detachable with respect to each other, the pivot including a magnet wherein at least a portion of the pivot is disposed at a substantially central point on the top.
摘要翻译: 绘图板包括底座; 在顶上; 枢轴,其连接顶部和底部,顶部和底部可相对于彼此旋转和拆卸,枢轴包括磁体,其中枢轴的至少一部分设置在顶部上的大致中心点。