A circle symbol means professional care, not a home machine: the letter inside names the process — W is wet-cleaning, P and F name the dry-cleaning solvent class — and bars underneath show a milder process, the same way they do on the wash symbol.
Wet-Cleaning
Professional wet-cleaning, normal process (W)
Professional wet-cleaning, mild process (W)
Professional wet-cleaning, very mild process (W)
Do not wet-clean (W)
Dry-Cleaning
Dry-clean with perchloroethylene or hydrocarbons, normal (P)
Dry-clean with perchloroethylene or hydrocarbons, mild (P)
Dry-clean with hydrocarbons only, normal (F)
Dry-clean with hydrocarbons only, mild (F)
Do not dry-clean
Other symbol families
Scan a professional-care symbol instead of memorizing it
Laundry Master's AI care-label scanner reads wet-cleaning and dry-cleaning symbols straight off the label and tells you what to ask a professional cleaner for.