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Galvanized screw piles screwed into the ground. Rubble at the construction site.
Cochliomyia hominivorax, the New World screw-worm fly, or screw-worm for short, is a species of parasitic fly that is well known for the way in which its larvae (maggots) eat the living tissue.
Furniture plug for Euro screws in the hand of a Caucasian woman. Covers a hole in furniture.
Cross section of dental implant showing cement and screw types
Premolar and Molar tooth crown installation over implant, screw fixation. 3D illustration of dental treatment

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