发明授权
EP0751161B1 Sulfur-containing urethane-based resin composition, optical element and lens comprising this resin 失效
聚氨酯系树脂组合物及光学元件和透镜含硫,由其制成的

Sulfur-containing urethane-based resin composition, optical element and lens comprising this resin
信息查询
0/0