Cham am
Encyclopedia
The cham am is a unit of length, used during 18th – 20th century in Cambodia
Cambodia
Cambodia , officially known as the Kingdom of Cambodia, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia...

. It is equivalent to 12 Thneap
Thneap
The Thneap is a unit of length, used during 18th – 20th century in Cambodia.. It is equal to  cham am,  cm or about 20.0833 mm....

or 25 cm.
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