外丝直接也叫外牙直接，丝与牙是指管件金属部分的螺纹，外丝就是管件的外螺纹, 是金属管与非金属（主要指PP-R,PVC等塑料管）直接连接的连接管件。PVC给水管还有内丝直接，也是作为管件连接用的
Zibo Hengrun HVAC equipment Co., Ltd. was established in 2008. Since its establishment, Zibo Hengrun HVAC equipment Co., Ltd. has become the core distributor and first-class agent of Lejia Environmental Protection equipment and Priesta Environmental equipment Technology Co., Ltd. We mainly undertake all kinds of domestic and commercial central air conditioning projects, new ventilation projects, air purification projects, engine room air treatment projects, kitchen smoke removal projects, installation of household fresh air systems and sales of related product accessories. Is the air quality improvement product and the professional service provider.
Zibo Hengrun HVAC Equipment Co., Ltd. pursues the development principle of "taking science and technology as the lead, talent as the foundation, quality as the basis for survival", relying on the strong professional strength, and based on the first-class talents and management. Adopting advanced process technology and management experience, supplemented by "high quality materials, fine construction", advocating the business creed of "making less money, doing fine works, seeking long-term", and striving to make every project into a model project. From this also got more and more customers trust. In the central air conditioning engineering company to improve the application of air conditioning technology for the purpose of constantly learning and absorbing advanced technology at home and abroad relying on high technology to provide customers with perfect air conditioning space.
The company has a professional installation and after-sales service team, all staff after comprehensive training, after strict assessment, with a solid theoretical foundation and rich practical experience. According to your different requirements, the company can provide cost-effective products for you to design, implement the best air conditioning solutions and after-sales service programs.
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