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<?xml version="1.0"?>
<!--This is a valid file-->
<sdf version="1.8">
<model name="top_model">
<frame name="top_frame"/>
<link name="top_link">
<pose relative_to="top_frame"/>
</link>
<model name="mid_model">
<pose relative_to="top_link"/>
<link name="mid_link"/>
<model name="bottom_model">
<pose relative_to="mid_link"/>
<link name="bottom_link"/>
</model>
<model name="bottom_model_2">
<model name="mid_model">
<link name="mid_link"/>
</model>
<link name="bottom_link">
<pose relative_to="mid_model::mid_link"/>
</link>
</model>
<frame name="mid_to_bottom" attached_to="bottom_model::bottom_link"/>
</model>
</model>
</sdf>
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