Hook is a hydraulic lifting platform car attached lifting device.
吊钩是液压升降平台车的附加起重装置。
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。
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