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The stock (stator) of the slide rule is the fixed part. This part usually has the most of the scales. They are normally marked on the face but may be on both the face and back of the stock.
The cursor is used to ensure correct alignment of the slide and stock
If the slide has scales on both front and back faces, the stock may also have small clear plastic "windows" or marks on the rear to enable these scales to be used without removing the slide.
Sometimes the stock has standard rulers, marked in inches or centimetres. These perform no role in calculation.
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