پی.پی.ام
related: اكسیژن حل‌شده
related: اكسیژن
broader: یكاها
preferred label: p.p.m @en
type: Concept

اكسیژن
preferred label: oxygen @en
type: Concept
related: پی.پی.ام

یكاها
preferred label: dimensions @en
type: Concept
narrower: پی.پی.ام

اكسیژن حل‌شده
preferred label: Dissolved Oxygen(DO) @en
type: Concept
related: پی.پی.ام