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https://www.bjjglobetrotters.com/wp-content/uploads/2019/01/winter-camp-2019-back-attacks-from-different-concepts-with-mariusz-grzywinski-RYYzpV1eMY0.jpg7201280BJJ Globetrottershttps://www.bjjglobetrotters.com/wp-content/uploads/2022/06/bjj-globetrotters-logo-header-1.pngBJJ Globetrotters2019-01-16 21:19:452023-02-26 02:16:06Winter Camp 2019: Back attacks from different concepts with Mariusz Grzywinski