$ roslaunch open_manipulator_gazebo open_manipulator_gazebo.launch
/clock
/gazebo/link_states
/gazebo/model_states
/gazebo/set_link_state
/gazebo/set_model_state
/open_manipulator/gripper/kinematics_pose
/open_manipulator/gripper_position/command
/open_manipulator/gripper_sub_position/command
/open_manipulator/joint1_position/command
/open_manipulator/joint2_position/command
/open_manipulator/joint3_position/command
/open_manipulator/joint4_position/command
/open_manipulator/joint_states
/open_manipulator/option
/open_manipulator/states
/rosout
/rosout_agg