Answers

  • Brainly User
2016-04-17T14:52:11+05:30
Lubrication,roller bearings, wheels ofcourse
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short and good
Comment has been deleted
2016-04-17T14:54:11+05:30
Some techniques are as follows :-

1. Use of lubricants.
2. Use of cushion machines.
3. Roller bearings etc..
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