释义 |
tower crane
tower crane n (Mechanical Engineering) a rotatable cantilever jib on top of a steelwork tower used on building sites where the operator needs to command a good view of the site Tower crane
tower crane[′tau̇·ər ‚krān] (civil engineering) A crane mounted on top of a tower which is sometimes incorporated in the frame of a building. Tower craneA crane in which the lifting mechanism is mounted on top of a tower that is structurally independent of the structure it is working on. tower craneA type of crane consisting of a fixed vertical mast which is topped by a rotating boom, equipped with a winch for hoisting and lowering loads and placing them at any location within the diameter of the boom. |