Figure 4.
(a) The standalone progressive cavity pump (PCP), DUROPACT DP 326S, and (b) 3D concrete printing test device (3DPTD).
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.