I want to know the answer to the following question:
Bell's dehusking machine combined what with nail brushes?
All the background I'm provided with is that "He was told wheat had to be dehusked through a laborious process and at the age of 12, Bell built a homemade device that combined rotating paddles with sets of nail brushes, creating a simple dehusking machine that was put into operation and used steadily for a number of years.". Is that enough to answer the question?
Answer: yes