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I don't think the slash is the problem. Are you sure that the frame for the messages is /rslidar ?

You can verify the correct frame_id for your lidar messages. First play the bag file, then do rostopic echo <lidar_topic_name>, when you echo to the lidar messages you can see the correct frame_id for this message. In RVIZ if you change the global option frame to the one you see in rostopic echo, you should be able to see Lidar data.

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