English to Serbian Tech/Engineering Mechanics / Mech Engineering Aktuator u uslovima prekida dovoda vazduha

Referenca: http://www.dressermasoneilan.com/documents/LiteratureLibrary... 123. strana.
Tekst glasi: Positioner cannot control the failure position of an actuator without a spring. The actuator
can, under different conditions, fail in place, fail open, or fail close. In cases where the
valve must fail to a required position additional control equipment is required.