在镜架上
型号代码由2个字母+4个数字组成（如：RB2140F），印记在标准镜架的左镜腿内部。
在网站中
型号代码记录在每个产品详细介绍的页面中。 代码由2个字母+4个数字组成（如：RB2140F），如上图中所示。
*Bio-acetate is obtained by combining two main components: cellulose acetate (a polymer derived from cotton or wood pulp) and a bio-based plasticizer made from renewable sources (cereals, beet or sugar cane). The bio-based plasticizer is used in substitution for the traditional fossil-based plasticizer, increasing the overall bio-based content1 from renewable sources to 67%2. The percentage of bio-based carbon content indicates how much of the material mixture is obtained from renewable sources versus petrochemical or fossil sources.
1. Calculated using the ASTM D6866 international standard
2. Against the average bio-content of 40% of standard acetate
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