→ skos:altLabel → "Operating Tool"@en, "Tool"@en
→ skos:prefLabel → "Working Unit"@en, "Рабочий орган"@ru
→ od:SouchkovDefinition → "One of the key components (subsystems) of a Complete Technical System that, according to the Law of System Completeness performs a function acting on a product for which the technical system has been developed."@en