It is predicted that the market demand of wires of brass , bronze and german silver will increase by 10 % annually .
铜合金线材中的黄铜线、青铜线和锌白铜线的需求量年增长速度均超过10%。
On the way to German Cupellation Loss of Silver in Silver Assay and Its Correction
踏上留学德国的旅途铅试金法测银的灰吹损失与校正