国机精工：陶瓷球轴承主要应用于航天航空以及高速机床等领域

Group 1 - The core viewpoint of the article is that Guojijinggong (国机精工) has confirmed the primary applications of its ceramic ball bearings in aerospace and high-speed machine tools [1] Group 2 - The company responded to investor inquiries on September 30 regarding the use of its products [1]