Case T-301/16: Judgment of the General Court of 10 April 2019 — Jindal Saw and Jindal Saw Italia v Commission (Dumping — Imports of tubes and pipes of ductile cast iron originating in India — Implementing Regulation (EU) 2016/388 — Regulation (EC) No 1255/2009 (replaced by Regulation (EU) 2016/1036) — Dumping margin — Determination of the export price — Association between an exporter and an importer — Reliable export price — Construction of the export price — Reasonable margin for selling, general and administrative costs — Reasonable margin for profit — Injury to the Union industry — Calculation of price undercutting and the injury margin — Causal link — Access to confidential data of the anti-dumping investigation — Rights of the defence)