Theory of Machine
The inversion of a mechanism is

Turning its upside down
Obtained by reversing the input and output motion
Obtained by fixing different links in a kinematic chain
Changing of a higher pair to a lower pair

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Theory of Machine
Sensitiveness of the governor is defined as the ratio of the

Sum of the maximum and minimum equilibrium speeds to the mean speed
Mean speed to the maximum equilibrium speed
Mean speed to the minimum equilibrium speed
Difference of the maximum and minimum equilibrium speeds to the mean speed

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