supply of different materials for construction of rbm road from kabinda to aath barman within bhetaguri-i g . p . within dinhata-i p . s . , stone aggregate below 40 mm nominal size , loading unloading & stacking sand/ stone aggregate less than 40 mm nominal size ) , river bed metal , stone aggregate ( single size ) : 63 mm nominal size , stone aggregate 40 mm nominal size and above , loading unloading & stacking stone aggregate ( above than 40 mm nominal size ) , stone screeint type a ( 13 . 2mm ) , higher charges of diesel road roller 8 to 10 tones , work site favilities , display board , gst