densiometer造句

• Other methods for estimating crown closure include the use of line-intercept, spherical densiometer, and hemispherical photography.
• Wilhelm works in a metal building 100 feet from his home in Grinnell, where he tests the photographs under various conditions and monitors their condition with a densiometer that detects any fading He uses accelerated methods in his testing, so it is not necessary to wait 50 years, for instance, to gauge how much a given paper will fade in 50 years ..