Update 01_AccessoryForTank.rst

source/Robotics/01_AccessoryForTank.rst

@@ -180,7 +180,32 @@ The bearing wheel can be seen as follows, which is assembled by two bearings. So
    :alt: Bearing wheel TB-09
    :figclass: align-center
 
-    Bearing wheel TB-09  
+    Bearing wheel TB-09
+
+Plastic Bearing Wheel
+^^^^^^^^^^^^^^
+
+Similarly, there has the plastic bearing wheel to fit the caterpillar TC-09 with the following parameters:
+
+* Color: black
+* Material: plastic
+* Size: 50*35 mm
+* Hole Size: M4 (which can be connected by M4 screw.)
+.. figure:: ../_static/pbearingwheel.jpg
+   :align: center
+   :alt: Plastic bearing wheel for TC-09
+   :figclass: align-center
+
+    Plastic bearing wheel for TC-09
+
+Metal Driving wheel TW-03 for TC-03
+^^^^^^
+In fact, the TW-03 is the same as the TW-09. The only difference is the size, together with the following paramters.
+
+
+
+
+