Tender For supply of a- supply, installation and commissioning of vibrating wire pressure cell-stress cell as per specification attached. , b- supply, installation and commissioning of borehole extensometer-mpbx vibrating wire type 3- point model as per specification attached. , c- supply, installation and commissioning of centre hole rock bolt load cell - vibrating wire guage type as per specification attached. , d- digital tape extensometer as per specification attached. , e- tape extensometer anchor with hook as per specification attached. , f- digital readout unit as per specification attached.