Shipments to the United States
Due to changes in U.S. customs regulations, all shipments to the United States are now subject to customs clearance.
This means that the recipient will be required to pay customs duties, as well as any applicable taxes and fees upon import.
Please also note that delivery may be delayed while the shipment is being processed by U.S. customs.
![Cover for Zhonglin Xu · Air Purifier: Property, Assessment and Applications (Paperback Book) [Softcover Reprint of the Original 1st 2019 edition] (2018)](https://imusic.b-cdn.net/images/item/original/870/9789811347870.jpg?zhonglin-xu-2018-air-purifier-property-assessment-and-applications-paperback-book&class=scaled&v=1609786979)
![Cover for Zhonglin Xu · Dynamic Isolation Technologies in Negative Pressure Isolation Wards (Paperback Book) [Softcover reprint of the original 1st ed. 2017 edition] (2018)](https://imusic.b-cdn.net/images/item/original/409/9789811097409.jpg?zhonglin-xu-2018-dynamic-isolation-technologies-in-negative-pressure-isolation-wards-paperback-book&class=scaled&v=1609981436)
![Cover for Zhonglin Xu · Dynamic Isolation Technologies in Negative Pressure Isolation Wards (Hardcover Book) [1st ed. 2017 edition] (2016)](https://imusic.b-cdn.net/images/item/original/226/9789811029226.jpg?zhonglin-xu-2016-dynamic-isolation-technologies-in-negative-pressure-isolation-wards-hardcover-book&class=scaled&v=1508238089)
![Cover for Zhonglin Xu · Fundamentals of Air Cleaning Technology and Its Application in Cleanrooms (Paperback Book) [Softcover reprint of the original 1st ed. 2014 edition] (2016)](https://imusic.b-cdn.net/images/item/original/118/9783662513118.jpg?zhonglin-xu-2016-fundamentals-of-air-cleaning-technology-and-its-application-in-cleanrooms-paperback-book&class=scaled&v=1545622857)
![Cover for Zhonglin Xu · Fundamentals of Air Cleaning Technology and Its Application in Cleanrooms (Hardcover Book) [2014 edition] (2013)](https://imusic.b-cdn.net/images/item/original/730/9783642393730.jpg?zhonglin-xu-2013-fundamentals-of-air-cleaning-technology-and-its-application-in-cleanrooms-hardcover-book&class=scaled&v=1408495857)