| 单词 | oar-swivel |
| 释义 | > as lemmasoar-swivel ΚΠ 1866 Sci. Amer. 13 Oct. 254/3 Oar Swivel.—Martin Fryer, Greenbush, N. Y. I claim the combination of the swivel, A, with the ring, B, and its slot, b, and the ring C, with its pin, c, operating together in the manner and for the purpose intended. 1875 E. H. Knight Amer. Mech. Dict. II. 1542/1 Oar-swivel, a pivotal device for an oar on the gunwale. < as lemmas |
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