1. The diameter of different parts of
pricker is indicated by machine number. The smaller machine number means the larger diameter.
刺针不同部位的直径用机号来表示，机号越小表示直径越大。
2. in the third section, except letter H representing"Hengxiang" brand, the other group of digits represent the characters different parts of
pricker.
第三部分除英文字母H代表“恒翔”牌外，其余一组数字表示叉形针的各部特征。
3. in the third section (12-17 digits), except letter H representing "Hengxiang" brand, the other group of digits represent some special characters of
pricker.
第三部分（12-17位）除字母H代表“恒翔”牌外，其余一组数字表示刺针的一些特殊点。
