Figure 2.
Materials and samples: (a) Three-layer cardboard on the top and five-layer ECOBOX cardboard on the bottom; (b) An octabin (octagonal-base box).
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.