החיפוש שביצעת - communication conversion del dispersion ((from wave) or (from wastes)) - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
communication conversion » communication conversation, communications convention, communication cohesion
conversion del » conversion _
del dispersion » model dispersion, models dispersion, metal dispersion
from wastes » from waste, from water, food wastes
from wave » from waves, from cave, from wage

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