Dr Pulley Sliding Roller vs Round Roller in variator

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In the video,you'll see the low gear shift of Dr.Pylley's SR is much lower than round roller and the high gear shift of Dr.Pulley's SR is also higher than round roller.
So SR will provide powerful take-off and higher top end.
see www.unionmaterial.com to get more information.
Pulleys with scale, pulleys, how pulleys work, physics

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