robosumo/envs/assets/bug.xml [111:116]:
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    <jointvel name='vel_hip_1'   joint='hip_1' />
    <jointvel name='vel_hip_2'   joint='hip_2' />
    <jointvel name='vel_hip_3'   joint='hip_3' />
    <jointvel name='vel_hip_4'   joint='hip_4' />
    <jointvel name='vel_hip_5'   joint='hip_5' />
    <jointvel name='vel_hip_6'   joint='hip_6' />
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robosumo/envs/assets/spider.xml [143:148]:
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    <jointvel name='vel_hip_1'   joint='hip_1' />
    <jointvel name='vel_hip_2'   joint='hip_2' />
    <jointvel name='vel_hip_3'   joint='hip_3' />
    <jointvel name='vel_hip_4'   joint='hip_4' />
    <jointvel name='vel_hip_5'   joint='hip_5' />
    <jointvel name='vel_hip_6'   joint='hip_6' />
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