what is the meaning of mandra
I suppose you must be meaning 'mantra'.
Mantra : A word or sound repeated to aid concentration in meditation. It is literally considered to be a 'sacred utterance' in Vedism; one of a collection of orally transmitted poetic hymns.
Mandra is a town and municipality in the central part of West Attica, Greece. Since the 2011 local government reform it is part of the municipality Mandra-Eidyllia, of which it is the seat and a municipal unit.
Mandra is part of the Athens metropolitan area. Mandra is located about 25 km northwest of Athens, about 5 km north of Elefsina, ENE of Corinth and southeast of SSE of Thiva. It has mild summers and fairly cold winters. The town’s population was 10,947 at the 2001 census. It is known for its big industrial zone. Mandra is bypassed by the GR-3 (Elefsina-Thiva). The area around Mandra has farmlands located near the boundary with Magoula. There are mountains including Pateras to the west and to the north. The municipal unit of Mándra has a land area of 205.770 km2 and a population of 12,792 inhabitants. The municipal unit also includes the villages of Ágios Sotír (pop. 496), Néa Zoí (443), Palaiochóri (356), Diódia (174), Pournári (174), and several smaller settlements.