EP 3 800 002 A1 EUROPEAN SEARCH REPORT Application Number EP 20 19 9919 Europäisches Patentam European P. . ee des brevets’ DOCUMENTS CONSIDERED TO BE RELEVANT CN 106 956 080 A (SHANGHAI RAILWAY 12-15,1 COMMUNICATION CO LTD) 18 July 2017 (2017-07-18) * abstract; figure 1 * CN 202 577 076 U (NINGXIA DABA POWER 12-15,1 GENERATION CO LTD) 5 December 2012 (2012-12-05) * abstract; figure 1 * TECHNICAL FIELDS SEARCHED (IPC) Place of search Date of completion of the search Examiner Munich 11 February 2021 Jeggy, Thierry CATEGORY OF CITED DOCUMENTS T : theory or principle underlying the invention E: earlier patent document, but published on, or X: particularly relevant if taken alone after the filing date Y : particularly relevant if combined with another D: document cited in the application document of the same category L: document cited for other reasons A: technological background O: non-written disclosure & : member of the same patent family, corresponding P : intermediate document document Re EPO FORM 1503 03.82 (P04C01) page 2 of 2 18