Theory of Machine
The inversion of a mechanism is

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

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Theory of Machine
The maximum fluctuation of speed is the

Difference of minimum fluctuation of speed and the mean speed
Variations of speed above and below the mean resisting torque line
Difference of the maximum and minimum speeds
Sum of maximum and minimum speeds

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