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耐磨耐腐蚀合金BZn12-24锌白铜线材 C75720/CuNi12Zn24白铜铜线
C75720 CuNi12Zn24洋白铜 CuNi25镍白铜板CN103白铜块2.0830白铜
1Cr17Ni2不锈钢板圆棒