i. The contact negative pressure cleaning method does not require sealing or on-site protection, and can complete cleaning and vacuum cleaning work in one go. Suitable for small and medium-sized rectangular air ducts, especially suitable for cleaning rectangular air ducts in public places such as hospitals, office buildings, hotels, schools, shopping malls, supermarkets, etc.
Ii. The contact negative pressure cleaning method has no secondary pollution, does not require sealing and on-site protection, and can complete cleaning and vacuum cleaning work in one go. It has the characteristics of high cleaning efficiency, health and environmental protection. Multiple modules can be combined arbitrarily to clean various small and medium-sized air ducts such as circular air ducts and rectangular air ducts. It can also clean various types of dirt such as floating dust and non oily dust, and is particularly suitable for cleaning small and medium-sized air ducts in industrial, enterprise, exhibition venues, and other places.
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