Case T-146/09: Judgment of the General Court of 17 May 2013 — Parker ITR and Parker-Hannifin v Commission (Competition — Agreements, decisions and concerted practices — European market for marine hoses — Decision finding an infringement of Article 81 EC and Article 53 of the EEA Agreement — Price-fixing, market-sharing and the exchange of commercially sensitive information — Attributability of unlawful conduct — Fines — 2006 Guidelines on the method of setting fines — Legal certainty — Ceiling of 10 % — Mitigating circumstances — Cooperation)