| 单词 | derrickcrane |
| 释义 | > as lemmasderrick-crane derrick-crane n. see sense 2c. derrick-crane c. A kind of crane (more fully derrick-crane) in which the jib is pivoted to the foot of the central post, so that it may take various angles with the perpendicular; a ‘jib and tie’ crane. Also often applied to any outstanding jib or arm with a pulley at the end, e.g. those outside the lofts of stables, warehouses, etc. ΚΠ 1856 R. W. Emerson Eng. Traits xvi. 282 Swinging a block of granite..with an ordinary derrick. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 127 Derrick, the hoisting-tower over an artesian well-boring. 1885 E. Du Cane Punishm. & Prevent. Crime 179 The construction of the large cranes and derricks in the quarries. < as lemmas |
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