| http://www.w3.org/ns/prov#value | - The actuating mechanism 45(1)??? of the VFF set 36 a??? comprises a series combination of double-lead acme type screws 46??? engaged with a single rotatable carrier or device shaft 48??? via spur gears 60???, 62???, which utilizes a common actuating means (not shown), such as an electric motor, an air motor and valving system, or other mechanism known and used in the art.
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