photoconductor target photocopier photocopy photocopying photocurrent photocurrent density photodiode photodiode parametric amplifier photoduplicate photoeffect photoelasticity photoelastic method photoelastic study photoelastic varnish photoelectret photoelectret state photoelectric photoelectric absorption photoelectrically active photoelectric amplifier |
photoconductor target ядр. фотопроводяща мишена Търсената дума е намерена |