1. 钢笔尖：pen motor == 记录笔电动机 | pen nib == 钢笔尖 | pen oscillograph == 描笔式示波器,笔式示波器

2. 笔尖清洁剂：笔尖清洁剂 pen handle | 笔尖清洁剂 pen nib | 鸭嘴笔尖(圆规) pen point

noun

1. the writing point of a pen

Synonym: nib