A magnetorheological (MR) clutch is a device to transmit torque by the shear stress of MR fluids.
磁流变离合器是通过磁流变液的剪切应力传递转矩的器件。
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Silicone oil fan clutch is a new kind of transmission device using viscous shear force of silicone oil to transfer torque, which is widely used in engine cooling systems.