天壕能源：公司主营业务包括天然气供应及管输运营的燃气板块和膜产品研发生产销售的膜业务板块

Group 1 - The company, Tianhao Energy, primarily engages in natural gas supply and pipeline operation within its gas segment, as well as membrane product research, development, production, and sales in its membrane business segment [1] - The company does not involve itself in any oil-related business activities [1]