It is a vibratory centrifuge
It is the propeller.
Three concentric and rotating shafts would be known as a contra-rotating device. Currently, several machines like these are being designed, according to the US Patent Office.
b'coz transformer is not a moving parts so it works on the princeple of mutual induction
inductor
A shaft bearing is a low friction support device for a rotating member of a mechanical machine.
A guard is a device designed to prevent injury from rotating machinery.
collimator
There are lots of device that rotate; one of them is a wheel.
a propeller
a engine
a Propeller
removes the Ethernet header and trailer
propeller
propeller.
It is the propeller.
the cotton grin is a mechanical device that removes the seeds from cotton
The most important one is the blast furnace.