井口价格 meaning in English

pit head price

The third part analyzed the influence factor of natural gas industry rate structure in china . the fourth part of the thesis mainly studied the natural gas wellhead price of china
论文还指出：依据中国化肥工业的实际情况，对化肥用户的天然气井口价格不宜定的太高；对于其它工业用户可采用成本加成方法确定井口价格。
The second part of this thesis concisely retrospect the development of natural gas industry in china , and then analyzed and studied the present condition and the main problem of our natural gas industry rate structure
论文将居民、商业用户归为一类，运用二部收费的原理和方法，制定了中国天然气居民、商业用户的井口价格模型。