Добро пожаловать.~YIWU DONGQING IMP&EXP CO.,LIMITED
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Designed for conducting laboratory experiments in mechanics. The device consists of a ruler and a wooden block with a loop on its end and three sockets for weights.
联系人：Jason
手机：+ 86 15314959887
电话：+ 86 13362968680
邮箱：42303348@qq.com
地址： No.508, Xicheng Road, Chengxi Street, Yiwu,Zhejiang,China
