Manually applied power-driven machine for automatically delivering and driving a fastener

作者: Edgar S Moore

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参考文章(11)
Gra C Brown, Gregory F Mcnulty, Screw-driving machine ,(1919)
William Evans Colwell, Pneumatic hammer for driving nails. ,(1910)
Alonzo W Ruff, Nail-driving apparatus ,(1926)
William E Mclaughlin, Pneumatic screw driver ,(1929)
Frank H Dellaree, Screw feeding mechanism ,(1926)