... 多气孔钢锭：blown ingot 多雷含金粗银：dore silver 多孔性硬镀铬：porous chrome hardening ...
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The time it takes to refine dore silver bars, which are a semi-pure alloy and usually created at the site of a mine, are somewhere in the middle of jewelry and electronics.
FORBES: FOCUS: Little Scrap Silver Seen On Market After Run To $50
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