CPC Main Group G01C 9/00 Measuring inclination, e.g. by clinometers, by levels 6 direct subcodes Child Classifications Navigate with arrow keys, Enter to open G01C 9/005 G01C 9/02 Details G01C 9/10 by using rolling bodies G01C 9/12 by using a single pendulum (plumb lines G01C15/10) G01C 9/16 by using more than one pendulum G01C 9/18 by using liquids