作者: Gregor Vossmann
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摘要: A locking mechanism has a lower member secured to seat base, and an upper that can rotate relative the is back. control element capable of being rotated with bar. spring biases toward first configuration in which drives radially away from bar so restricts rotation member. The second configuration, rotates traveling during configuration. drive allowed. transmission positioned between flange proximate outer side member, flanges restrict movement members one another functions as axial safety device.