Ug construction of rcc wall at 2l/3ds in bottom section of hr seam for sealing off borehole to arrest the egress of water from old working of ib seam at orient colliery mine no 4, osa, oa, mcl
Ug construction of rcc wall at 2l/3ds in bottom section of hr seam for sealing off borehole to arrest the egress of water from old working of ib seam at orient colliery mine no 4, osa, oa, mcl
Wall Tenders