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J. Int. (2011) 186, 385–389 doi: 10.1111/j.1365-246X.2011.05089.x EXPRESS LETTER Crustal thickness and Vp/Vs ratio of the central and western North China Craton ...

China has shut down manyVPNservices based in the country recently, but the Ministry of Industry and Information Technology (MIIT) emphasized that ...

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