बोकारो स्टिल कारखानाखौ 1964 आव गायसनदों नाथाय जि बोसोरनि उनाव 1974 निफ्रायसो दिहुननो जागायो ।
Bokaro Steel Plant has been established in 1964 but since 1974 , after ten years , the production has been initiated .