| 单词 | floating derrick |
| 释义 | > as lemmasfloating derrick d. floating derrick: one erected on a kind of boat, with a horizontal boom supported by stays from the top of the central post. ΚΠ 1874 E. H. Knight Amer. Mech. Dict. I. 688/1 Bishop's floating-derrick..used in 1850..is capable of self-propulsion by means of paddle-wheels, and thus removes its suspended load to a position of safety for repair or other purpose. floating derrick floating derrick n. (see derrick n. 2d). < as lemmas |
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