单词	tower crane
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 crane A 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 crane A 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.
随便看	breasthook breasthooks breast imaging quality standards act breast imaging reporting and data system breast imaging-reporting and data system breast implant breast implantation breast implant illness breast implants breast implants/breast reconstruction breast infection breasting breasting dolphin breast international group breastknot breast lesion breast lesion excision system breastless breastlessly breast lift breast lining breast lobule breast lump breast lymph node breast lymph node assay

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