The "torture machine" is actually a dental X-Ray unit.
A co-production between West Germany, Spain and the United States, it is also known as The Seven Secrets of Sumuru, City Without Men, Sumuru Queen of Femina, Rio 70, and Future Women.
The film is a sequel to The Million Eyes of Sumuru (1967), based on Sax Rohmer's Sumuru character. With the exception of Shirley Eaton as Sumuru, all the other characters and actors are different, except for Maria Rohm, although she plays a different character.
Riffed by the guys from Mystery Science Theater 3000 (1988) under the RiffTrax name, Michael J. Nelson, Bill Corbett, and Kevin Murphy.