Prep of sub grade 200 mm avg th gsb 250 mm th wmm 200 mm th dbm 60 mm th incl prime coat ac 40 mm thick consolidated with hmp mix incl tack coat compaction as per morth for surf wk km 1.500 to km 20 on khotakpa tshobaley in64 rcc dantak bhutan

Roof bolting by dgms approved portable hydraulic roof bolting machine suitable with wet drilling arrangement to drill 1.50 long hole in roof having medium to fine grand sand stone strata with 27mm dia drill bit for anchoring of 20/22 mm dia roof bol

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 ... complete at umaria colliery

Bi-metallic clamp for dtr brass pad 50x50x6mm with 20 mm hole fitted on aluminium portion size 70x40x20mm fixing with 06 no. gi nut and bolt spring and plain washer weight 0.600 gram

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

Imetallic clamp suitable for ptr flat brass size 60x60x10 mm, central 20 mm hole having a joint aluminum section size 60x70x42 mm with 06 no. gi nut and bolts flat and spring washer, weight 0.900 gram