Research on key technologies of cloud service platform for machine tool remanufacturing lndustry Research on the technological innovation level of China's equipment manufacturing industry Research on high technology service import affects on manufacturing efficiency Research on key technologies of cloud-edge-end trusted collaboration Research on the contribution of value added tax of China's manufacturing industry Research on the declining proportion of China's manufacturing industry Research on the use mechanism of intellectual property in China's remanufacturing industry Research on the coupling development of producer services and manufacturing industry Research on the excess capacity over Chinese manufacturing industry