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Why do a lot of biped and quadrupedal robots have the first link of their legs angled back and the second link angled forward? : r/robotics
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Figure 4 | Balancing of humanoid robot using contact force/moment control by task-oriented whole body control framework | SpringerLink
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Figure 1 from Design improvement of a 2-DOF ankle joint actuation mechanism for a humanoid robot | Semantic Scholar
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