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new file mode 100644
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diff --git a/urdf/signs/dae/alvar13_neg_1.dae b/urdf/signs/dae/alvar13_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..d95f9562f5b9c32a59bd1a4d45786aab42a31dcb
--- /dev/null
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new file mode 100644
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--- /dev/null
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diff --git a/urdf/signs/dae/alvar15_neg_1.dae b/urdf/signs/dae/alvar15_neg_1.dae
new file mode 100644
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diff --git a/urdf/signs/dae/alvar16_neg_1.dae b/urdf/signs/dae/alvar16_neg_1.dae
new file mode 100644
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--- /dev/null
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diff --git a/urdf/signs/dae/alvar17_neg_1.dae b/urdf/signs/dae/alvar17_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..c7ff327618db32628d0a72034765ecc87dc8aea4
--- /dev/null
+++ b/urdf/signs/dae/alvar17_neg_1.dae
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new file mode 100644
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diff --git a/urdf/signs/dae/alvar20_neg_1.dae b/urdf/signs/dae/alvar20_neg_1.dae
new file mode 100644
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diff --git a/urdf/signs/dae/alvar4_neg_1.dae b/urdf/signs/dae/alvar4_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..30b00b42f3e00f4c7e7a8371ff3665131a348ab1
--- /dev/null
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diff --git a/urdf/signs/dae/alvar5_neg_1.dae b/urdf/signs/dae/alvar5_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..ccc5135833335cfd595cb0884c70972e61bd2bae
--- /dev/null
+++ b/urdf/signs/dae/alvar5_neg_1.dae
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diff --git a/urdf/signs/dae/alvar6_neg_1.dae b/urdf/signs/dae/alvar6_neg_1.dae
new file mode 100644
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--- /dev/null
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diff --git a/urdf/signs/dae/alvar7_neg_1.dae b/urdf/signs/dae/alvar7_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..0d561d9696456a9ee68745a22c28d78dbe759116
--- /dev/null
+++ b/urdf/signs/dae/alvar7_neg_1.dae
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diff --git a/urdf/signs/dae/alvar8_neg_1.dae b/urdf/signs/dae/alvar8_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..9d70d28b6eb788833073958cea91f378c1f9f3f9
--- /dev/null
+++ b/urdf/signs/dae/alvar8_neg_1.dae
@@ -0,0 +1,170 @@
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diff --git a/urdf/signs/dae/alvar9_neg_1.dae b/urdf/signs/dae/alvar9_neg_1.dae
new file mode 100644
index 0000000000000000000000000000000000000000..5528197f4f4496e706b681122da1faa153250bd4
--- /dev/null
+++ b/urdf/signs/dae/alvar9_neg_1.dae
@@ -0,0 +1,170 @@
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