振江股份：目前公司防松紧固件每年有少量销售用于长征系列火箭脐带架等部位

Group 1 - The core viewpoint of the article is that Zhenjiang Co., Ltd. has a small annual sales volume of anti-loosening fasteners used in the Long March series rocket umbilical support and other components [2] Group 2 - The company engages in the production of specialized fasteners for aerospace applications, indicating a niche market focus [2] - The interaction with investors highlights the company's transparency and willingness to communicate about its product applications [2]