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]

Core Viewpoint - The company Guojijinggong (002046.SZ) specializes in ceramic ball bearings primarily used in aerospace and high-speed machine tool applications [1] Group 1 - The company's ceramic ball bearings are mainly applied in the aerospace industry [1] - The ceramic ball bearings are also utilized in high-speed machine tools [1]