قطب نما طرح برانتون Compass Model DQL-8

The Pocket Compass Model DQL-8 is a necessary measuring instrument for geology survey , colliery, other mine exploitation and ***** can measure direction, obliquity, gradient, upright, milemeter, horizontal etc.
â—Main specification
Damping time of needle <15s
Graduation circle 0°~360°
Dial scale 1°
Precision of long air level 20' ± 5'/2mm
Precision of circle air level 30' ± 5'/2mm
Reading error ≤0.5°
Color Black
Material Aluminium alloy crust
Size 80×70×35mm
Weight 0.24kg