The gauge tracking natural gas sectors extends gains in the afternoon trading; more than 20 companies' stocks hit the limit up, including Sino Geophysical and Guangzhou Devotion Thermal Tech.
Gas futures prices in Europe also hit a record high of $1,000 per 1,000 cubic meters.
天然气板块持续走高，潜能恒信、迪森股份等超20股涨停，致远新能、广州发展跟涨。
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