午间涨跌停股分析：57只涨停股、1只跌停股，工业气体概念活跃，凯美特气2连板，中船特气涨停

Group 1 - A-shares saw a total of 57 stocks hitting the daily limit up and 1 stock hitting the limit down during the first half of the trading day on August 13 [1] - The industrial gas sector was notably active, with KMTQ (凯美特气) achieving a consecutive limit up and CSIC (中船特气) also hitting the limit up [1] - The military industry concept stocks strengthened, with Changcheng Military Industry (长城军工) achieving 7 limit ups in 10 days and Hunan Tianyan (湖南天雁) hitting the limit up [1] Group 2 - The CPO concept stocks rose, with Guangku Technology (光库科技) achieving a consecutive limit up [1] - Among the stocks with consecutive limit ups, Jishi Media (吉视传媒) had 6 limit ups in 8 days, Hongtong Gas (洪通燃气) had 6 limit ups in 7 days, and Aerospace Science and Technology (航天科技) had 5 limit ups in 7 days [1] - ST Aowei (新奥维) had 5 limit ups in 6 days, while Xinjiang Jiaojian (新疆交建) achieved 4 consecutive limit ups [1] Group 3 - Zhejiang Dongri (浙江东日) and Tongzhou Electronics (同洲电子) both had 3 consecutive limit ups, while Guosheng Jinkong (国盛金控) and Bowei Alloy (博威合金) had 2 consecutive limit ups [1] - Other stocks that hit the limit up include Haosika (海思科) and Changcheng Securities (长城证券) [1] - ST Gaohong (高鸿) faced a continuous decline, hitting the limit down for 3 consecutive days [1]