Decimillimeter (dmm)
Decimillimeter (dmm) :
A metric unit of distance equal to 0.1 millimeter (10-4 meter) or about 3.937 mils. The unit is used in civil engineering for stating the results of penetration tests of asphalt concrete, in which a needle is pushed into the concrete under specified conditions. Although this unit is allowed by some standards agencies, the use of compound prefixes such as decimilli- is not permitted in the SI
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