| 单词 | jaw-bit |
| 释义 | > as lemmasjaw-bit jaw-bit n. U.S. Engineering a bar which holds together the bases of the two projections of a pedestal (or axle guard), below the journal-box. ΚΠ 1879 Car Builders' Cycl. Amer. Pract. 91/1 Jaw-bit, a bar extending across the mouth of a jaw underneath a journal-box and bolted to the horns of the pedestal. 1889 Cent. Dict. Jaw-bit, a short bar placed beneath a journal box to unite the two pedestals in a car-truck. 1906 Car Builder's Dict. at Pedestal The two projections of a pedestal are called pedestal horns, and the space between them a jaw, which is closed at the bottom by a Jaw Bit. < as lemmas |
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