| http://www.w3.org/ns/prov#value | - The blade retractor 34, in some embodiments, may position the left segment 24 and right segment 26 of the second blade 22 by translating the motion of the blade retractor 34 to the segments by way of a cam and follower, gear arrangement, four-bar mechanism, lever, electric motor, hydraulic or pneumatic actuator, or other method known in the art.
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