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conversion

換算　—　Measuring

Putting things of different units onto one and the same measure.

Conversion table for old and new currency (1957) Conversion table for old and new currency (1957)1957 Vierlander (common silver of the four lands) Vierlander (common silver of the four lands)Established 1433 2 Euro, Greece (Europa) 2 Euro, Greece (Europa)2002
A photograph of the real thing this term names.

In monetary history, we compare coins from different eras and countries. Since they cannot be compared directly, we convert them to a common measure: the weight of pure silver. This is why this school insists on weight × fineness.