14.2.1. 設定 state 狀態
<xacro:arg name="laser_visual" default="false"/> # Visualization of LDS. If you want to see LDS, set to `true`<scan>
<horizontal>
<samples>360</samples> # The number of sample. Modify it to 24
<resolution>1</resolution>
<min_angle>0.0</min_angle>
<max_angle>6.28319</max_angle>
</horizontal>
</scan>

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