◎◎◎ bicycle ⪢⪢
A bicycle is a vehicle with two wheels.
http://qindex.info/i.php?x=13640
○○○ Ground X-Vehicle ⪢⪢
Another failed DARPA project is the Gound X-Vehicle. The original mission was to create a safer military vehicle without adding too much armor around the body, wheels.
http://qindex.info/i.php?x=23664
◌◌◌ Lever
Jared, fulcrum, wheelbarrow
http://qindex.info/i.php?x=9646
◌◌◌ tools
cone, toolbox, bolt, nut, washer, screw, nail, Allen keys, hex keys, caulking gun, silicon gun, grinder, wheelbarrow, ladder, step ladder
http://qindex.info/i.php?x=27923
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