(A) Two, Pen Plotters and Electrostatic Plotters
(B) Two , Drum Plotters and Flatbed Plotters
(C) Four , Pen , Electrostatic , Drum and Flatbed plotters
(D) Three , Pen , Electrostatic and Flatbed Plotters
(A) Two, Pen Plotters and Electrostatic Plotters
(B) Two , Drum Plotters and Flatbed Plotters
(C) Four , Pen , Electrostatic , Drum and Flatbed plotters
(D) Three , Pen , Electrostatic and Flatbed Plotters
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