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Otu ngwaahịa

Chart projector

Nke chart Projector bụ ngwaọrụ nwere AC nke ezubere iji wepụta onyonyo n'ihuenyo maka nyocha ọhụụ.Enwere ike ijikwa eserese na-ebu diski, efere ihe nkpuchi na tube index astigmatic site na mkpịsị aka enyere n'ihu panel nke projector.