China Cleaning code for ai GB Standards Search Result

and Chinese version GB Standards, you can purchase directly in the web page; After receive your payment, we will send the GB Standards PDF file to your Email within 1~3 days.
2. Other English version GB Standards are not ready translated, only after get your order, then we translate them, time usually need 3-5 days .


	GB 19210-2003 Cleaning code for air duct system in heating，ventilating and air-conditioning systems 空调通风系统清洗规范 - 英文版

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