Study of\ price regulation in China's natural monopoly industry 并列正题名：Study of\ price regulation in China's natural monopoly industry Comparative study on regulation reform of natural monopoly industry 并列题名：Comparative study on regulation reform of natural monopoly industry Study on the property rights model of the reform of Chinese natural monopoly industries Studying on legal controlling efficiency to regulatory power of Chinese natural monopoly industry 并列题名：Study on the property rights model of the reform of Chinese natural monopoly industries 并列题名：Studying on legal controlling efficiency to regulatory power of Chinese natural monopoly industry Study on the price reform of the monopoly industries