In the case of 2bowl calender machine, it could't help using for damaged roller to gring on account of occuring the defects on the on the surface of fabric on the finishing pr***ss, if the surface of woolen paper roll or plastic roll took place the damages such as pin hole, crack, etc.
But , in the case of 3bowl calender machine, the merit are that don't take place the damaged marks unless same place between upper roll and bottom roll occuring them and we can get the speeding up of the machine.
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