diff --git a/robots/b1_description/xacro/const.xacro b/robots/b1_description/xacro/const.xacro
index 5de2a43..c63991b 100644
--- a/robots/b1_description/xacro/const.xacro
+++ b/robots/b1_description/xacro/const.xacro
@@ -33,6 +33,29 @@
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