Dko is a wholly owned enterprise established by Dutch Environment Group (DEC) in Beijing in 1996, with a registered capital of 10.5 million yuan. In order to expand production capacity, Suzhou Dakjing Wind Pipe Co., Ltd. was established in January 2018. DEC Group is a multinational company specializing in the production of various ventilation pipe products, and is one of the largest hose manufacturers in the world. All kinds of ventilation hose products produced have obtained the testing and certification of more than 20 countries in the world, including UL 181 and BS476. DCO adopts (DEC) Group complete automated production line and produces in strict accordance with the product specifications and process of DEC Group. The main products are divided into eight series, suitable for all kinds of high, medium and low pressure ventilation, exhaust and corrosive medium, high temperature insulation occasions. After more than 20 years of development in China, Dko has formed two production bases in Beijing and Suzhou, and established three marketing centers in Shanghai, Beijing and Guangzhou. To provide high-quality hose products and services to major domestic industries, including construction, nuclear industry, military industry, electronics industry, aerospace transportation industry, etc.