<正>1 IntroductionLabour Economics is devoted to publishing research in the field of labour economics both on the microeconomic and on the macroeconomic level,
The rapeseed oil extracted from the mature seeds was purified by refining processing,and the rheological characteristic analysis of the viscosity and dynamic sh
Mineral compositions and microstructures of fluorine-bearing magnetite concentrate and vanadium-titanomagnetite concentrate are studied. The results show that a
The limitations in existing measures for absorbing pressure impact in hydraulic systems were summarized in this paper. Based on the forming principle of the oil