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A. Analyzer*
B. Rectifier*
1. Wash
2. Steam
3. Liquid out
4. Alcohol vapour
5. Recycled less volatile components
6. Most volatile components
7. Condenser *Both columns are preheated by steam
A column still, also called a continuous still, patent still or Coffey still, is a variety of still consisting of two columns. Column stills can produce rectified spirit (95% ABV).