| http://www.w3.org/ns/prov#value | - As is clear from the above, the valve driving apparatus according to the present invention can be used as any type of apparatus such as an apparatus of a double-acting cylinder type, an apparatus of a spring-return type or an apparatus of a double-acting two-cylinder type and can be utilized for any valve merely by suitably selectively using the mechanisms between which the case proper is mounted.
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