天然气输配管网具有自然垄断的基因，有着规模经济性以及范围经济性。但若任其滥用垄断地位允许其自由缔结合同则有限制竞争和损害消费者权利之虞。

With the essence of natural monopoly and freedom of contract, if such a dominant undertaking abuses its market power, there is a risk of eliminate the competition and harming the consumer interest.

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