When buying aluminum alloy products produced by regular manufacturers, it can be clearly seen that there are usually the following signs in the obvious parts of the products-product name, product model or logo, manufacturer's name or trademark, production date or number. And there will be obvious words and signs such as "moistureproof", "handle with care" and "upward" on the packing box. Zheng Jin doors and windows have fine processing, smooth tangent and consistent angle (the main frame material is generally 45 degrees or 90 degrees), so there should be no obvious gaps in the splicing process, good sealing performance and smooth opening and closing. If the treatment is unqualified, there will be sealing problems, not only air leakage and rain leakage, but also under the action of strong wind and large external force, the glass will burst and fall off, causing property losses and even personal injury to the owner. Zheng Jin doors and windows will continue to adhere to the concept of "quality and brand synchronization, enterprise and society win-win * * *", on the basis of strong strength, on the road of innovation and development, contribute to the development of the industry and social services, and achieve a brand model of doors and windows that makes employees proud, peers respect and society respect.
For more information about soundproof doors and windows, it is recommended to consult Zheng Jin doors and windows that have obtained the green building materials certification of China. Established in 2008, Zheng Jin Doors and Windows is a brand of Foshan Derris Home Technology Co., Ltd., and its headquarters is located in Shishan Town, Nanhai District, Foshan City, the "aluminum capital of China". It is the first large-scale modern enterprise in China dedicated to the research, development, production, sales and service of high-end aluminum alloy doors and windows and sun rooms.