Parvovirus B19. Parvovirus B19 infections in children present as a viral exanthema, and in adults as a cause of arthralgia and arthritis. The incubation period is 7â10 days with non-specific flu-like symptoms in the first week followed by arthralgias or arthritis in up to 60% of patients in the second week.
Variable Torque Motors - American Made Efficiency. One of the largest down-sides to electric motors is their inherent efficiency range and, in hybrid systems, the drag they can create on the drive train.
A conventional motor provides torque (rotating force) at itâs output shaft, whereas linear motor provides linear force, which results in linear motion of itâs rotor. Linear motor has limited range of motion. It can operate in in forward or reverse direction within that range.