diff --git a/tutorials/sphereGranFlow/RotaryAirLockValve/ReadMe.md b/tutorials/sphereGranFlow/RotaryAirLockValve/ReadMe.md
index f68d5e89..a5c13aa2 100644
--- a/tutorials/sphereGranFlow/RotaryAirLockValve/ReadMe.md
+++ b/tutorials/sphereGranFlow/RotaryAirLockValve/ReadMe.md
@@ -183,15 +183,9 @@ model
     // Poisson's ratio [-]
     nu    (0.25 0.25
                 0.25);
-
     // coefficient of normal restitution
     en    (0.7  0.8
                 1.0);
-
-    // coefficient of tangential restitution
-   et    (1.0   1.0
-                1.0);
-
     // dynamic friction
     mu    (0.3  0.35
                 0.35);
@@ -204,7 +198,7 @@ model
 # Performing simulation and seeing the results 
 To perform simulations, enter the following commands one after another in the terminal. 
 
-Enter `$ particlesPhasicFlow` command to create the initial fields for particles (here the simulaiton has no particle at the beginning).  
-Enter `$ geometryPhasicFlow` command to create the geometry.  
-At last, enter `$ sphereGranFlow` command to start the simulation.  
-After finishing the simulation, you can use  `$ pFlowtoVTK` to convert the results into vtk format stored in ./VTK folder.
\ No newline at end of file
+Enter `particlesPhasicFlow` command to create the initial fields for particles (here the simulaiton has no particle at the beginning).  
+Enter `geometryPhasicFlow` command to create the geometry.  
+At last, enter `sphereGranFlow` command to start the simulation.  
+After finishing the simulation, you can use  `pFlowtoVTK` to convert the results into vtk format stored in ./VTK folder.