One New Caledonian crow, called Betty, bent some straight wire into a hook and used it to lift a small bucket of her favourite food from a vertical pipe.
一只名叫贝蒂的新喀里多尼亚乌鸦把一根笔直的铁丝咬成一个弯钩，用它把一小桶她最喜欢吃的食物从一根垂直的管子里吊了出来。
A new calculation mode of the earth stress of vertical fracture is built based on generalized Hook 's law in this paper, which is suitable to hydraulic fracturing cracks.
该文基于广义虎克定律，建立了适用于水力压裂裂缝为垂直裂缝的地应力计算模式。
A practical hook structure of band saws with carriage and the fine adjustment structure of the vertical stake of the carriage are introduced.
介绍了一种实用的跑车带锯机扎钩结构和跑车立桩的微调结构。
A practical hook structure of band saws with carriage and the fine adjustment structure of the vertical stake of the carriage are introduced.
介绍了一种实用的跑车带锯机扎钩结构和跑车立桩的微调结构。
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