| 单词 | taper tap |
| 释义 | > as lemmastaper tap taper tap n. Mechanics a tap (tap n.1 4) tapered lengthways for about two thirds of its length, used to begin the process of cutting a screw thread in a hole. ΘΚΠ society > occupation and work > equipment > machine tool > other specific machine tools > [noun] > machine for cutting screw-threads > taps screw tap1678 tap1678 plug tap1815 tap-tool1874 bottoming tap1875 taper tapa1877 second tap1888 a1877 E. H. Knight Pract. Dict. Mech. III. 2495/1 The process of screw-cutting was greatly improved by Maudslay, who introduced the practice of having three cutting edges, and using three taps, the entering taper tap, the middle tap, and the plug tap. 1964 S. Crawford Basic Engin. Processes i. 24 The taper tap has a chamfer or tapered lead for a length of 8–10 threads. < as lemmas |
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