CSN 42 3850-1976 Gold-silver-cadmium-zinc-copper alloy Au58 5 Ag12 Cd11 2 Zn0 4 Cu (purity 585 1000 Au)《金 银 镉 锌 铜合金 Au58 5 Agl2 Cd11 2 Zn0 4 Cu》.pdf

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