החיפוש שביצעת - ((optical detectors) or (chemical reactors)) industrial applications.* - חזר ריק.
אולי כדאי לנסות איות אחר או כתיב מלא:
optical detectors » chemical detectors
chemical reactors » chemical reactions, chemical reaction
applications.* » application.*
optical detectors » chemical detectors
chemical reactors » chemical reactions, chemical reaction
applications.* » application.*
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