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单词 machine bolt
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machine bolt
machine bolt n. Engineering a bolt with a thread and a square or hexagonal head.
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society > occupation and work > equipment > building and constructing equipment > fastenings > [noun] > bolt
bolt1626
dag1727
machine bolta1884
a1884 E. H. Knight Pract. Dict. Mech. Suppl. 569/2 Machine bolt... A machine screw is similar except as to the head, which has a slit for the insertion of the screw-driver.
1971 Tools & their Uses (U.S. Navy Bureau of Naval Personnel) (1973) iv. 113 The machine bolt..is held with a wrench to prevent it from turning.
extracted from machinen.
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