（编辑 任世碧） 证券日报网讯 2月24日，通裕重工在互动平台回答投资者提问时表示，公司全资子公司济南冶科所主要 从事硬质合金及相关产品的研制、生产和销售，生产包括金刚石压机用顶锤、棒材、盾构刀具、数控金 属切削工具等。 ...

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].

Core Viewpoint - The news highlights the significant role of private enterprises in the construction of the Ningbo-Zhoushan Railway's underwater tunnel, emphasizing their contributions to innovation and technology in overcoming engineering challenges [1][5]. Group 1: Project Overview - The Ningbo-Zhoushan Railway's underwater tunnel is the world's longest and largest diameter underwater high-speed rail tunnel, set to end the historical lack of railway access in Zhoushan [1]. - Nearly 300 companies are involved in the construction, with over 90% being private enterprises, including national-level specialized "little giant" companies [1]. Group 2: Engineering Challenges - The project faces unprecedented challenges, particularly in the first 5,000 meters of soft soil, which is highly permeable and loose, making it difficult to avoid risks like water ingress and collapse [2]. - The construction goal is to achieve 5.4 kilometers of continuous tunneling without changing the cutting tools, a first in domestic soft soil underwater tunnel construction [2]. Group 3: Technological Innovations - Private enterprises have developed specialized equipment to meet the extreme conditions of the project, including a new transport vehicle capable of navigating a 9% incline, surpassing the traditional 8% limit [3]. - The cutting tools used in the shield machines have been enhanced through private sector innovation, achieving a welding strength of over 240 MPa, allowing them to withstand significant stress [2]. Group 4: Precision and Quality Control - Private companies are responsible for critical components such as the rubber sealing rings, which must endure a water pressure of 2.5 MPa, ensuring the tunnel's longevity and safety [4]. - An intelligent assembly robot developed by a private enterprise has improved the precision of box culvert assembly from centimeter-level to millimeter-level, enhancing construction accuracy [4]. Group 5: Collaborative Efforts - The project exemplifies the collaboration between state-owned and private enterprises, with private companies playing a crucial role in supporting national infrastructure projects through innovation and technology [5].

Core Viewpoint - The company currently does not produce or sell shield tunneling tools but is open to expanding its product applications based on market demand [1] Group 1 - An investor inquired about the company's production and sales of shield tunneling tools and their technical level [1] - The company has a variety of tool products with a wide range of downstream applications [1] - The company will continue to explore product application areas in response to market demand [1]

Group 1 - The company, 欧科亿 (688308.SH), has a wide variety of tool products and applications in various downstream sectors [1] - Currently, the company does not have shield tunneling tools in its product lineup [1] - The company plans to expand its product application areas based on market demand [1]

公司回答表示：尊敬的投资者，您好！公司盾构刀具相关产品的客户包括中国中铁、中国铁建、中国交 建等知名大型综合建设集团旗下企业。感谢您的关注。 金融界8月1日消息，有投资者在互动平台向厦门钨业提问：我在洛阳金鹭（厦门钨业子公司）公司产品 介绍中看到其盾构机图片，其开发盾构机刀盘、硬岩滚刀、镶齿滚刀供应国内外哪些供应商单位，谢 谢。 ...