החיפוש שביצעת - irrigation requirements patents ((functions e) OR (((functions esf) OR (functions euler)))) gives~ - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
irrigation requirements » irrigation equipment, nutrition requirements
requirements patents » requirements patterns, requirements papers, requirements water
functions euler » functions error, functions e.l, functions ecole
functions esf » functions egfr, functions e.l, functions ernst
gives » given, give

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