Differential screw

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a compound screw by which a motion is produced equal to the difference of the motions of the component screws.

See also: differential

References in periodicals archive ?
These benefits are achieved with a unique design consisting of only three parts--head, holder, and differential screw.
These benefits are achieved with the help of three parts: head, holder, and differential screw.
This wedge is activated by a differential screw - pulling the shank into the adaptor.

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