Research on R&D tax incentives for technology-based small and medium-sized enterprises 并列题名：Research on R&D tax incentives for technology-based small and medium-sized enterprises Research on the development of Russian small and medium-sized enterprises Research on credit measurement of small and medium sized enterprises Research on coordinated development of urbanization and small and medium-sized enterprises Research on financing difficulties and countermeasures of small and medium-sized enterprises Research on financing of small and medium-sized enterprises 并列题名：Research on the development of Russian small and medium-sized enterprises 并列题名：Research on credit measurement of small and medium sized enterprises Service practice of micro, small and medium-sized enterprises