广钢气体今日20cm涨停，有2家机构专用席位净卖出1.31亿元

Group 1 - Guanggang Gas experienced a 20% limit-up increase today, with a transaction volume of 1.037 billion yuan and a turnover rate of 8.69% [1] - The post-market dragon and tiger list indicates that the Shanghai Stock Connect special seat bought 74.234 million yuan and sold 37.845 million yuan [1] - One institutional special seat had a net purchase of 106 million yuan, while two institutional special seats had a net sale of 131 million yuan [1]