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By putting oil this reduces friction and also heat
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Friction can be reduced by polishing :-by polishing the surfaces friction can be reduce.using ball bearing:- friction can be  reduce by using ball bearing which converts sliding motion in rolling motion  and Lubricants :- oil or grees is used between two surface in contact to reduce the friction.this method of reduceing frictions......
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plz,mark it as best..
t5hanks for answer
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