The metallic materials used for Douai must be qualified during development. These materials have to be assessed in terms of application risks. It can improve the power efficiency of electricity
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Douai has to go through a series of professional production stages including material selection, quality inspection, the initial product test before it goes to the gift shops. Its aluminum foil is not easy to break
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Douai is manufactured complying with the mandatory standards for the textile industry. Its raw materials and the agents are required to pass the ingredient test to guarantee no harmful substances are contained. The product has been certified under CE and RoHS
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Douai design, development, and testing process are driven by regulatory standards. These standards are in line with the international medical device standards issued by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). The product has been certified under CE and RoHS
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Douai will be tested on its water treating performance in terms of capacity on removing suspended solids and microbial pathogens, as well as the water quality and contamination levels. It boasts for both its low impedance and high frequency
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has long service life and many other technical superiorities, is especially suitable for field. The product is highly resistant to high voltage