| 单词 | knuckle-thread |
| 释义 | > as lemmasknuckle-thread knuckle-thread n. a rounded thread in a screw. ΘΚΠ society > occupation and work > equipment > building and constructing equipment > fastenings > [noun] > screw > thread > types of thread worm1725 drunkenness1786 square thread1838 V-threada1877 buttress thread1882 knuckle-thread1887 1887 D. A. Low Introd. Machine Drawing (1892) 15 The angles of the square thread are frequently rounded... If this rounding is carried to excess we get the Knuckle thread shown at (d). < as lemmas |
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