Vikram Singh, 46, is among six men involved in a child sex ring in Buckhinghamshire, southeast England, who were sentenced for sexually abusing the two girls.
The Old Bailey court was told the abuse in Aylesbury went on for years and involved offences including rape and child prostitution.
The men, from Aylesbury, Milton Keynes and Bradford, were said to have carried out the offences between 2006 and 2012.
Singh got 17 and a half years in prison while accomplices Asif Hussain, 33, was jailed for 13 and a half years for three counts of rape; Arshad Jani, 33, for 13 years for rape and conspiracy to rape; Mohammed Imran, 38, for 19 and a half years for the count of rape; Akbari Khan, 36, for 16 years for two counts of rape; and Taimoor Khan, 29, for three years for one count of sexual activity with a child.
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The offences, which all the defendants denied any involvement in, took place in cars, vans, flats and sometimes the girls' homes in Aylesbury, the trial heard. 11 defendants in total faced trial.
The court heard evidence from both victims, who came from troubled backgrounds and were befriended by the men who gave them alcohol, DVDs, food and occasionally drugs.
When she was 12 or 13, one of the girls - known as A - was passed between 60 Asian men for sex and had been conditioned to think it was normal behaviour, the jury was told.
The girls started to believe the men, some of whom were married with children, were their boyfriends.