החיפוש שביצעת - information ((concentration problems) OR (configuration problems)) diffraction esf fibre - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
concentration problems » concentration profiles, concentration from, construction problems
configuration problems » configuration problem, reconfiguration problem, configuration process
diffraction esf » diffraction f, diffraction fast, diffraction held
esf fibre » leaf fibre, opf fibre, efb fibre

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