【化】 octant rule
eight
【医】 octa-; octo-
area; borough; classify; distinguish; district; region; section
【计】 region
【医】 area; belt; field; quarter; regio; region; zona; zone
regulation; rule; formulae; order; rope
【计】 rule
【化】 regulation; rule
【医】 regulation; rule
【经】 propriety; regulations; rule