  We study symmetric simple exclusion processes (SSEP) on a ring in the
presence of uniformly moving multiple defects or disorders - a generalization
of the model proposed earlier [Phys. Rev. E 89, 022138 (2014)]. The defects
move with uniform velocity and change the particle hopping rates locally. We
explore the collective effects of the defects on the spatial structure and
transport properties of the system. We also introduce an SSEP with ordered
sequential (sitewise) update and elucidate the close connection with our model.
