… 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 … with the machinery of headings 84.25 to 84.30. It should also be noted that many parts do not fall in this heading … spider bowls, split bushing slips, beams, swivel sockets, and drilling jars, for well drilling machines …
… Musical instruments, the sound of which is produced, or must be amplified, …
Explanatory notes
… 92.07 ‑ Musical instruments, the sound of which is produced, or must be amplified, … devices with which they are fitted may produce faint sounds). In this respect, they differ from certain other …