Could you put Purex crystals in your clothes dryer?
No, they would leave oily stains on the clothes. It is best to use fabric softener sheets in the dryer.
A rotary clothes dryer is a dryer for your clothes and basically the name explains it all in its simplicity, it rotates. But i believe you are referring to a rotary clothesline which is used outdoors and it is where you hang your clothes on a line and it rotates to help them dry quicker. hope this helps.