Tender For roof bolting in ug by hiring of dgms approved portable hydraulic roof bolting machine with wet drilling arrangement drill 1.50mtr/1.80mtr length hole with 27mm dia drill bit for anchoring 20/22 mm dia roof bolting.... at umaria colliery
Tender For proposal for roof bolting by dgms approved portable hydraulic roof bolting machine suitable with wet drilling arrangement to drill 1.5 m long hole in roof having medium to fine grand sand stone strata with 27mm dia drill bit for anchoring of 20/22 mm