4 unchanged sentences
The lease will expire on November 30, 2034. Other operations are located at Sindalsvej 38-40, Risskov, Denmark, where we lease approximately 19,500 square feet, of which approximately 2,200 square feet is used for office space and 17,300 square feet is used for production.
−Removed: The leases will expire on August 31, 2024. 
−Removed: On September 23, 2021, LiqTech entered into a Lease Agreement through its wholly-owned subsidiary LiqTech Emission Control A/S, effective September 1, 2021, for a minimum term of eight years, and thereafter renewable upon six months’
−Removed: notice, with Plainvim (Taicang) Industrial Park Co., Ltd., a company organized under the laws of the Republic of China, pursuant to which LiqTech agreed to lease 91,752 square feet of property located at No.
−Removed: 525, Lingang South Road, Yuewang, Shaxi Town, Taicang City, Jiangsu Province, China.
−Removed: The China property will be used primarily for the production, warehousing and storage of filtration supplies, products, and equipment and for ancillary office purposes.
+Added: The lease will expire on August 31, 2024. 
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.