the class of model fragments about a 1-1-contol-volume
the control volume
(Forall (?1-1-Cv-Involved)
(<=> (1-1-Control-Volume ?1-1-Cv-Involved)
(Exists (?Self)
(And (1-1-Control-Volume-Op-Mode ?Self)
(= (1-1-Cv-Involved ?Self)
?1-1-Cv-Involved)))))
(Forall (?Self ?Time)
(<=> (Active ?Time 1-1-Control-Volume-Op-Mode ?Self)
(1-1-Control-Volume-Op-Mode ?Self)))