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Keshawn12
Keshawn12 Keshawn12
  • 11-02-2017
  • Chemistry
Answered

only number 6 and number 9 please and thank you

only number 6 and number 9 please and thank you class=
only number 6 and number 9 please and thank you class=

Verified Answer :

Phamtom21
Phamtom21 Phamtom21
  • 11-02-2017

Number 9 adding oil lubricates the chain making it easier to pedal. Also the oil prevents rusting

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