for any rotorless rheometer or mooney viscometer, as a measurement device, it marked by its manufacturer with the nominal output, such as the oscillation frequency, the torsional strain, the die temperature and the test time, or the rotor speed, etc. but there may be differences between the nominal outputs and the reals causing from different structure, design principles, wear-out, or even improper operation, which becomes main reasons of the test result differences before concerning the test result differences from rubber materials.
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