| 2. | Factors which have to be considered when establishing the price system for natural gas were analyzed by a case study . in the calculation , factors such as consumer tax , quantity , exchange rates , fuel prices on the intemational market , capital costs ( investment in the pipeline networks ) , and regional suitable prices etc . , were involved 在天然气价格计算方法中,涉及到了消费税、使用量、货币汇率、国际燃料价格、天然气基价(管线网络设施的投资) 、按地区的适用价格等因素。 |