航海装备板块7月31日跌2.05%，国瑞科技领跌，主力资金净流出7.76亿元

Core Insights - The maritime equipment sector experienced a decline of 2.05% on July 31, with Guorui Technology leading the losses [1] - The Shanghai Composite Index closed at 3573.21, down 1.18%, while the Shenzhen Component Index closed at 11009.77, down 1.73% [1] Sector Performance - Key stocks in the maritime equipment sector showed significant declines, with China Shipbuilding down 1.41% at a closing price of 34.33, and Guorui Technology down 5.71% at 17.00 [1] - The trading volume for major stocks included China Shipbuilding with 546,700 shares and Guorui Technology with 576,100 shares [1] Capital Flow - The maritime equipment sector saw a net outflow of 776 million yuan from institutional investors, while retail investors contributed a net inflow of 697 million yuan [1] - Individual stock capital flows indicated that Guorui Technology had a net outflow of 1.03 billion yuan from institutional investors, while retail investors contributed 847 million yuan [2]