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plural rolamites
A simple machine consisting of a stressed metal band and counter-rotating rollers within an enclosure, used in low-friction bearings etc. quotations examples
This unit is made up of a rotary torque motor, a rolamite to linear translation mechanism and a metal bellows as a fluid pump.
1969, National Heart Institute (U.S.), Artificial Heart Program Conference
Thus, many such things as virtually frictionless bearings, switches, valves, etc. can be constructed from rolamites.
1973, Eldon A. Byrd, How Things Work, page 74