注：从2003年起天然气产量不包括四川省境内气矿的产量。

Note: Output of natural gas since2003 excludes that of gas mining areas in Sichuan.

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同样的，额外的气矿收入可以解释一些单位会比原先有更高的价格。

Likewise, the added gas income might explain the higher price on some units which were previously a lot less expensive.

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重庆气矿的部分采输气管线在冬季不同程度地受到水合物冰堵的影响。

Part of gas production and transportation pipelines in Chongqing gas Well Area is affected to some extent by hydrate ice barrier in winter.

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