Table of Similar Goods and Services Class 17 Rubber and plastics goods 1706 Insulating materials and articles 绝缘电瓷（C170021） Class 17 Similar group 1706 绝缘电瓷 C170021 Chinese 绝缘电瓷 English insulating electrical porcelain Spanish Porcelana aislante Item No. C170021 Class 17 Similar group 1706 Version 区分表 2026 文本（基于 NCL 13-2026，2026-01-01 起施行） Notes 英文、西文为参考译文（国家知识产权局自有项目，WIPO 无对应条目）