描述
Half circle, plastic , graduated in degree ‘0o to 180o in both directions, figured every 10o. The base is provided with a handle. Length of base 50cm.
透明磁性指針教學量角器（有手柄）Magnetic teaching Protractor with indicator
$200.00
材質：ABS，強力磁鐵
帶可拆卸指針，可以演示夾角
$200.00
材質：ABS，強力磁鐵
帶可拆卸指針，可以演示夾角
Half circle, plastic , graduated in degree ‘0o to 180o in both directions, figured every 10o. The base is provided with a handle. Length of base 50cm.
