Firm multiple heterogeneity and export competitiveness of Chinese manufacturing industries 并列题名：Firm multiple heterogeneity and export competitiveness of Chinese manufacturing industries Study on the heterogeneity of competitiveness and export trade of Chinese manufacturing enterprises Geographical concentration and agglomeration of Chinese manufacturing industries 并列题名：Study on the heterogeneity of competitiveness and export trade of Chinese manufacturing enterprises Research on the competitiveness of advanced manufacturing industry exploration and practice of Chinese manufacturing industry 并列题名：Research on the competitiveness of advanced manufacturing industry Open & indigenous innovation and the enhancement of international competitiveness of China's manufacturing industries Rresearch on technical standard and international competitiveness of China manufacturing industry