Adaptor
Alignment device for a hand tool
Geological gyrocompass
Laser level, accessories and method of use
Laser positioning device
Light-tight combination micrographic map-reader protractor compa
Method and device for surveying the basal area of a forest stand
Multi-point measuring method and surveying device
Portable surveying compass with flux valve and gyrocompass align
Portable surveying gyrocompass apparatus
Rotating arm aiming device system
Sighting device for relocation of site
Stabilized sighting devices for vehicles
Suspension device for angle indicator