Research on the mechanism of firms' external technology search balance 并列题名：Research on the mechanism of firms' external technology search balance Research on the governance mechanism of financial technology security in China Research on the mechanism of core enterprise oriented cluster brand governance A research on the mechanism for primary-level social governance Research on knowledge transfer mechanism of transnational technology alliance Research on the mechanism of interest balance of library e-lending service Research on the mechanisms and policies for achieving inter-regional technological convergence 并列题名：Research on knowledge transfer mechanism of transnational technology alliance Research on the mechanism optimization of the rural social assistance