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直径25MM指南针配件类指南针加液指南针多种尺寸指南针
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1000个入一OPP袋
一箱10000个
单个重量3克
使用指南针的方法:指南针务必水平地拿着,让其能够自由旋转。刻度盘上的w代表西,N代表北,E代表东,S代表南。使用指南针时不要靠近铁磁物体、高压线及电磁器件等,以免造成误差和降低指南针灵敏度。
产品外直径25MM.里面加液体.铜冒芯.
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