Core Viewpoint - Shengbang Co., Ltd. (301233.SZ) announced the acquisition of three patent certificates from the National Intellectual Property Administration, including one invention patent, one utility model patent, and one design patent, effective from July 1, 2025, to December 31, 2025 [1] Group 1: Patent Information - The company obtained the following patents: - Invention Patent: "A Bidirectional Rotating High-Speed Oil Seal" (Patent No. ZL202210252151.0) with a protection period of 20 years [2] - Utility Model Patent: "An Air Cushion Sealing Component and Its Sealing Structure" (Patent No. ZL202423243650.7) with a protection period of 10 years [2] - Design Patent: "Inner Cone Coupling (4)" (Patent No. ZL202530062757.2) with a protection period of 15 years, held by Shengbang Dual-Core Technology Co., Ltd. [2] Group 2: Standard Participation - The company participated in the development of two national standards: - Standard Name: "Tolerance of Rubber Products Part 2: Geometric Tolerances" (Standard No. GB/T 3672.2-2), published on August 1, 2025, and effective from February 1, 2026 [3] - Standard Name: "Yaw Bearing and Pitch Bearing for Wind Turbines" (Standard No. GB/T 33154-20), also published on August 1, 2025, and effective from February 1, 2026 [3]

Core Viewpoint - Shengbang Co., Ltd. (301233.SZ) announced the acquisition of three patent certificates from the National Intellectual Property Administration, including one invention patent, one utility model patent, and one design patent, effective from July 1, 2025, to December 31, 2025 [1] Group 1: Patent Information - The company obtained the following patents: - Invention Patent: "A Bidirectional Rotating High-Speed Oil Seal" with patent number ZL202210252151.0, valid for 20 years [2] - Utility Model Patent: "An Air Cushion Sealing Component and Its Sealing Structure" with patent number ZL202423243650.7, valid for 10 years [2] - Design Patent: "Inner Cone Coupling (4)" with patent number ZL202530062757.2, valid for 15 years [2] Group 2: Standards Participation - The company participated in the development of two national standards: - Standard Name: "Tolerance of Rubber Products Part 2: Geometric Tolerances" with standard number GB/T 3672.2-2, published on August 1, 2025, and effective from February 1, 2026 [3] - Standard Name: "Yaw Bearing and Pitch Bearing for Wind Turbines" with standard number GB/T 33154-25, published on August 1, 2025, and effective from February 1, 2026 [3]

Core Viewpoint - The news highlights the significant role of private enterprises in the construction of the Ningbo-Zhoushan Railway's Jintang underwater tunnel, which is the world's longest and largest underwater high-speed rail tunnel, emphasizing the importance of private sector innovation and participation in major infrastructure projects [1][28]. Group 1: Project Overview - The Jintang underwater tunnel connects Ningbo and Zhoushan, marking the end of Zhoushan's history without railway access [1]. - The project involves nearly 300 participating companies, with over 90% being private enterprises, including national-level specialized "little giant" firms [3][26]. Group 2: Technological Innovations - The shield tunneling machine, a key piece of equipment, is supported by domestically developed core components, particularly the shield cutter, which is crucial for penetrating complex geological layers [5]. - The shield machine "Dinghai" weighs 4,350 tons and has a diameter of 14.57 meters, advancing at a speed of over 10 meters per day, with 5.6 kilometers of the 6,270-meter task already completed [6][11]. Group 3: Engineering Challenges - The project faces unprecedented challenges, including the need for a single-pass excavation of 5.4 kilometers in soft soil, which has never been attempted in domestic underwater tunnel construction [7]. - The construction site features soft soil layers that are highly permeable and loose, posing risks of water ingress and collapse during the tunneling process [7]. Group 4: Equipment Customization - Private enterprises have developed specialized equipment to meet the unique demands of the project, including a new transport vehicle capable of handling a slope of 9%, exceeding the typical 8% limit for conventional vehicles [18][20]. - The customized vehicle includes innovative features such as dual-head driving and enhanced maneuverability, significantly improving construction efficiency and safety [20]. Group 5: Precision Engineering - The project requires meticulous attention to detail, with private companies responsible for critical tasks such as waterproof sealing and precise assembly of components, which are vital for the tunnel's operational safety and longevity [21]. - A rubber sealing ring developed by a private enterprise can withstand water pressures of 2.5 MPa, equivalent to 20 times the pressure of a household pressure cooker, ensuring reliability in extreme conditions [23]. - An intelligent assembly robot developed by a private company has improved the precision of component assembly from centimeter-level to millimeter-level, enhancing the overall construction quality [24].