Picture hanging screw

作者: James Leroy Daniels

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参考文章(13)
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James M. Gallien, Double headed self tapping screw ,(2007)
Paul Gaudron, Auger-like drywall screw ,(2001)
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Harold Aberman, Timothy Simon, Wedge screw suture anchor ,(1999)
Michael E. Ward, Martin J. Nilsen, Michael C. Dill, Yongping Gong, Brick tie anchor and drive tool ,(2007)
Gerald D. Barth, Frank W. Bechtel, Fastener having primary and secondary threads ,(1997)
Paul Gaudron, Picture hanger fastener ,(2006)