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We focus on molecular dynamics simulated two-dimensional complex plasma crystals.We use rigid walls as a confinement force and produce square and rectangular crystals.We report various types of two-row crystals.The narrow and long crystals are likely to be used as wigglers;therefore,we simulate such crystals.Also,we analyze the electric fields of simulated crystals.A bit change in lattice parameters can change the inteal structures of crystals and their electric fields notably.These parameters are the number of grains,grains charge,length,and width of the crystal.With the help of electric fields,we show the details of crystal structures.