subscriber line interface equipment 用户线路接口设备;
The content ( by vo lume) of the former should be ≤ 0.88% for ≤ 16% cobalt alloy. Those over 0.88% in the standard photograph are pseudoimages resulting from too large particle slie of abrasive materials during polishing.
含钴量≤16%的合金中,共晶石墨的体积含量应≤c.88%,标准照片中>0.88%的照片,是抛光时研磨料粒子太粗造成的假象;
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