笔者对最近工作中遇到的几种黄色仿翡翠玉石的鉴定过程进行了阐述，以引起消费者的重视。
The identification procedures of several yellow imitation of jadeite encountered by the author recently is expatiated so as to draw attention of the customers.
通过分析仿形加工、NC加工的特点，提出一种将其两者有机结合的加工系统。
By analyzing the characteristics of profile modeling machining and NC-machining, a machining system is put forward and constructed which combines with the advantages of machining.
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