Definitions for "REDUCTION RATIO"
In microform records, the relationship between the size of a document and the size of a microimage. Usually expressed as 16x, 24x, etc. or as 16:1, 24:1, etc. Varies from low (below 15x), medium (15x through 30x), high (above 30x through 60x), very high (above 60x through 90x), and ultra high (above 90x). See also MAGNIFICATION RATIO.
The linear ratio of the side of the original document to the size of the microfilm image.
The relationship between the dimensions of the original document and the dimensions of the microimage of that document.
The comparison of the cross-sectional billet area to total cross-sectional area of the resulting extrusions. This is determined by the cross-sectional area of the container or upset billet divided by the cross-sectional area of the combined die openings.
Keywords:  gearboxes, rpm, shaft, respect, input
With respect to gearboxes it is the relationship between the number of RPM's applied to the input shaft and the number of RPM's transmitted to the output shaft. Usually the output RPM is assigned the value of 1 and the input RPM is expressed in relation to that value.