| http://www.w3.org/ns/prov#value | - In another moving stage (proposed in Japanese Patent Laid-open Application (Kokai) No. 63-101515 (1988)) which overcomes the above-described problem, throttle valves of exhaust nozzles from which compressed air is ejected can be adjusted using driving means, such as piezoelectric elements or the like, so that a movable member is not inclined.
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