Tender For bid to ras providing of mine development & operations service(mdo) - per mt based - open cast mining; manganeseore, 25 percent mn sm grade ore chl 442,mine development & operations service(mdo) - per mt based - open cast mining; manganeseore, 30 percent mn lghs lump ore chl 432,mine development & operations service(mdo) - per mt based - open cast mining; manganeseore, 35 point 5 percent mn ferro grade ore ch 4551