Explanatory notes
… consist essentially of a perforated plate, drum, basket or bowl, etc., revolving at great speed in a stationary … are also classified here (e.g., plates, drums, baskets, bowls and collectors). * * * The heading excludes certain … air pumps and blowers ( heading 84.14 ). (d) Centrifugal bolting (or sifting) machines for the milling industry ( …