即使经适当处理，在评级或封装前后，该等上色，着色，添加全息防伪，以及镶嵌宝石的钱币上的添加物的特性也有可能全部或部分丧失。
Colorized, painted, hologram, and jeweled Coins can, even with proper handling, before or after grading and encapsulation, lose some or all of these additive features.
研究探讨了熔融温度、熔融时间、碱基度对飞灰熔融处理前后重金属分布特性的影响。
The influence of fly ash on partition characteristics of heavy metals before and after melting treatment was studied, including the melting temperature, melting time and the basicity.
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