... Efficient absolute coding system Greatly improving the angle measuring accuracy and stability, as well as Instrument automation ... suddenly power off. No prism Ranging technologySlender laser beam precise rangingü Hi-Target ZTS-120/ ... theodolite, level,RTK GPS, GIS, handheld GPS, Rebound tester, laser vertical collimator, laser rangefinder, laser swinger, laser line marking, laser telescope rangefinder ...