Slope determination system

作者: Craig L. McAllester

DOI:

关键词:

摘要: A hand-held system for determining the slope of an element having irregular surface, such as a shingled roof, or along surface that is partially obscured by adjacent elements. The comprises inclinometer double indicator to provide two simultaneous readings slope.

参考文章(7)
James Webb, Levelling and transit system ,(1995)
Hamernick Stanley, Plumb and level ,(1932)
Lutz Donald Clyde, Steel square calculator ,(1950)
Floyd E Bateman, Level protractor tool ,(1957)