n.a threaded nut with winglike projections for thumb and forefinger leverage in turning
同义词：wing nutwing-nutwing screwbutterfly nut
Thumbnut construction
Thumb nut.
File:Thumb Nut on Bed.jpg
Test switch cover assembly
Rotating camera mount with counterweight
Bicycle tensioning device
Threaded thumbnuts.(Products)
Transfer scaled calipers
My invention relates to improvementso in stereofluoroscopic X-ray apparatus; and the objects of my improvement are to afford substan...
Viewing device to minimize parallax
