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RO5200 RO5400 Ta1 Ta2 Tantalum Plate Sheet ASTM B 708 1. Specification Of Tantalum Plate Sheet ASTM B 708: Tantalum sheet Purity:min 99.95% Grade:RO5200,Ta1,RO5400, RO5252(Ta-2.5W),RO5255(Ta-10W) ...