1.The use of the instrument Model DQL-2A is mainly used in: Survey status:Include strike,dip shift and dip angle. Survey the topography diagrammatically,fits azimuth(1.e.junction point).Survey the slop angle and determined the horizontal plane. Survey the vertical degree. Making topographical map. 2. Main specification Item specifications Damping time of magnetic needle 30-60s Graduation circle 0 360° Dial division value 1° The angle value of circle level 30′±5′/2mm(20°C) Color Sliver Material Aluminium alloy crust Size 77.5×66×20mm Weight 0.2kg