tachymeter
准距儀
Ta·chym·e·ter n.
1. Surveying An instrument, esp. a transit or theodolite with stadia wires, for determining quickly the distances, bearings, and elevations of distant objects.
2. A speed indicator; a tachometer.
◄ ►
tachymeter
n : a theodolite designed for rapid measurements [syn: tacheometer]