Międzynarodowej Klasyfikacji Patentowej (updated 2025-02-24)
Duration: 1:56
518.4K views | Nov 15, 2011
518.4K views | Nov 15, 2011
Duration: 4:32:42
663K views | Aug 16, 2020
663K views | Aug 16, 2020
Duration: 12:45
19.7K views | Apr 30, 2021
19.7K views | Apr 30, 2021