We continued to build up the production, supply, storage, and marketing systems for coal, petroleum, natural gas, and electricity, and enhanced our capacity to ensure energy security.

推进煤电油气产供储销体系建设，提升能源安全保障能力。

They established a marketing system which enabled them to bring their oil directly from their own refineries to the retailer, all in their own tank cars and tank wagons.

他们建立了一个营销系统，使他们能够将石油从自己的炼油厂直接运到零售商处，所有这些都使用他们自己的油罐车和油罐车。