Adjustable spirit level construction
Air-bubble level for portable tools
Alignment device utilizing components responsive to gravity
Alignment gage for dish antenna
Angle finding device
Angle meter and spirit level
Apparatus for measuring lateral inclination of a roadway with er
Attachment for a power saw to make plumb cuts
Attachment for a power saw to make plumb cuts
Azimuth angle measurement system and method for operating...
Azimuth measuring apparatus and method