他们受雇于天然气公用事业公司和煤气服务公司。
They are employed by gas utility companies and gas servicing companies.
毕尔巴鄂市地铁是由毕尔巴鄂的公用事业公司天然气公司（Naturgas）提供可再生能源动力的。
The subway was provided the renewable energy by local utility Naturgas.
输气干线管道将天然气从产地输向城市公用事业公司和其它用户。
Gas transmission lines carry natural gas from producing areas to city utility companies and other customers.
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