doctorow“Rotary Aero-Zep uses novel screw vanes”, 1930s https://danismm.tumblr.com/post/185782958959/rotary-aero-zep-uses-novel-screw-vanes-1930s
Jonkman Microblog is a social network, courtesy of SOBAC Microcomputer Services. It runs on GNU social, version 1.2.0-beta5, available under the GNU Affero General Public License.
All Jonkman Microblog content and data are available under the Creative Commons Attribution 3.0 license.