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.
Third row: low set including the degradation effects. Ideal value: horizontal line; ideal method: dotted line; SP: solid line; SR: dashed line; DW: dotted–solid line, and no compensation applied (represented by the symbol ): dot–dot–dash.
