176For that purpose, it must gather sufficiently precise and consistent evidence to support the firm conviction that the alleged infringement took place (see, to that effect, Joined Cases 29/83 and 30/83 Compagnie royale asturienne des mines and Rheinzink v Commission [1984] ECR 1679, paragraph 20; Joined Cases C-89/85, C-104/85, C-114/85, C-116/85, C-117/85 and C-125/85 to C-129/85 Ahlström Osakeyhtiö and Others v Commission [1993] ECR I-1307, paragraph 127; Joined Cases T-185/96 T-189/96 and T-190/96 Riviera Auto Service and Others v Commission [1999] ECR II-93, paragraph 47; Joined Cases T‑44/02 OP, T‑54/02 OP, T‑56/02 OP, T‑60/02 OP and T-61/02 OP Dresdner Bank and Others v Commission [2006] ECR II-3567, paragraph 62; and Case T-141/08 E.ON Energie v Commission [2010] ECR II-5761, paragraph 48).
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