Refer to the passage below and then answer the question afterwards in the same language as the passage: Passage: This designation was given to upgraded vehicles of the first batch of Leopard 2s, brought up to the standard of the second and third batches. This modernization gradually replaced the original PZB 200 sights in the first batch with thermal sights for the EMES 15 as they became available. Uyezve, upgrading kwaisanganisira kugadziriswa filler mawindo uye muvharo kuti mberi muviri mafuta Matangi kubvumira yoga refueling, uyewo kuwedzera mumwe deflector ndiro kuti periscope uye guru coverplate kudzivirira huripo NBC dziviriro hurongwa. Pakupedzisira, tangi akapiwa shanu-mita itsva towing netambo ane yakasiyana chinzvimbo. Chirongwa yakatanga muna 1984 uye yakaguma muna 1987; wechitatu, wechina uye wechishanu batch, izvo dzakabudiswa munguva iyi, akanga chete zvinhu. The modernized batch okutanga inogona kuzivikanwa nokufukidza denderedzwa buri apo moto-mhepo firimu ndiro yakabviswa. Question: Chii chakaita modernization kuti periscope kuwedzera?
kuiswa kwemabhureki ekuzadza nemakona kumatangi emafuta epamberi epamberi kubvumira kuzadza kwakaparadzana, pamwe nekuwedzerwa kweplate deflector yeperiscope uye chivharo chikuru