… Parts suitable for use solely or principally with the machinery of headings 84.25 …
Explanatory notes
… 84.31 ‑ Parts suitable for use solely or principally with the machinery of headings 84.25 … Note to Section XVI), this heading covers parts for use solely or principally with the machinery of headings 84.25 … of Chapter 87. (4) Rotary tables, swivels, kellies, kelly drive bushings, tool‑joints, drill collars, subs, …