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21006 coil spring set
21010 connector
21011 Pascal Ball
21012 buoyancy principle demonstrator
21013 Object floatation condition demonstrator
21014 Submarine floating and sinking demonstrator
21015 Liquid Internal Pressure Tester
21016 micro pressure gauge
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Ningbo Zhongqi Education Equipment Co., Ltd.
Tel：0574-6206 1266
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浙江七米
