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Guangdong D-TOP Industrial Co., Ltd , focuses on research and development, design, sales and service of aluminum alloy building materials, like windows and doors, sunrooms, glass curtain walls, pavilions, pergolas etc. We specialize in all kinds of aluminum alloy swing doors, folding doors, sliding doors, swing windows, sliding windows and so on. With good corporate reputation, first-class product quality and attentive service attitude, our product has won the trust and support of customers domestically and internationally. Since our establishment, we always adhere to the service, management, development, accumulation, and provide customers with the best quality service. We are always in pursuit of perfect by focusing on details, inheriting the German high-tech manufacturing technology, to keep our products quality fine and reliable. Every year we spend a lot of money on product research and development, and updating our technology. In addition, we undertake strict quality inspection, from raw materials to finished items, workshop, equipment maintenance, logistics, warehousing, etc, to fully guarantee the quality and safety. We adhere to the "salute to uncommon" product design concept, adopt the German technology, highlight the simple sense, designed by international designers and local designers, pursue the perfect combination of product features and design, launch more products to meet the needs of international market, and make "Top Window" a reliable and trustworthy brand and supplier.