self-propelled wheeled transfer cart
15 Self propelled car ideas | stem activities, stem projects,
Oct 14, 2017 – Explore Wendy Carrillo’s board “self propelled car” on Pinterest. See more ideas about stem activities, stem projects, projects for kids. Build a parachute for Santa, a shelf for the elf, and the tallest tree! 3 Holiday Themed STEM Challenges for
US3572455A – Self-propelled, electric, three wheel maintenance cart
The invention includes a three-wheeled, self-propelled, all purpose vehic...