大量现货批发黑色石墨粉耐火导电原材料鳞片状免费拿样

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Hebei ray river new materials technology ltd

Address:25 zhao zhenghashi, linshou county, hebei province
Tel:17732806198

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17732806198

大量现货批发 黑色石墨粉耐火导电原材料鳞片状免费拿样