A sua pesquisa - communications convention users ((dimensional database) or (dimensional databases)) under - não corresponde a nenhum registo.

Talvez deva tentar algumas variações de ortografia:
communications convention » communications connections, communication connection, communication conversation
dimensional databases » dimensional datasets, multidimensional databases, dimensional data
dimensional database » dimensions database, directional database, dimensional data
convention users » convention des, convention using, conversion user

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