Senses
铁笔/ 鐵筆 burin
A small steel knife used for carving seals or engraving
铁笔/ 鐵筆 stylus
A steel-tipped pen used for writing on stencils or wax paper for mimeographing.
铁笔/ 鐵筆 seal carving
The art or act of engraving seals with a burin