metal structure usually black or grey in color typically cylindrical or rectangular in shape a rotating arm that allows entry in one direction and prevents entry in the other direction an opening in the center a mechanical counter to track the number of people entering and exiting
turnstile which has metal structure turnstile which has usually black or grey in color turnstile which typically cylindrical or rectangular in shape turnstile which is a rotating arm that allows entry in one direction and prevents entry in the other direction turnstile which is an opening in the center turnstile which is a mechanical counter to track the number of people entering and exiting