Figure 2.
Schematic illustration of the fixed slope model. (a) 3-D illustration; (b) Scaled 2-D model (unit: mm).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.