orograph การใช้

• To facilitate topographical work in rugged terrain, he develops the orograph in 1873.
• Named from-graph ", the orograph is developed at the turn of the 1870s.
• B鴕resen became known internationally for a number of inventions, including an orograph ( a sighting instrument for coastal artillery ), a torpedo virator ( a guidance system for torpedoes ), and work on a tactical system for armored ships.