英和和英

a sleeve-nut

a sleeve-coupling

a chain link

an oscillatory circuit

the area surrounding a skating rink

an elliptic orbit

The noose loosened

the circular motion of the wheel

ring-shaped couple rings

sentinel loop

orbital revolution

the angle of rotation

squaring the circle

a wrench for turning a screw

a loop in a rope

wheels in axial rotation

a ring for holding a scarf in place

turn on a pivot

coincident circles

a coil which forms an electrical circuit

orbital arch

a butt joint that is welded

the knot of the girdle

a knot in a string, tied in the Japanese {'kobu-yui'} method

a gyroscopic compass

concentric circles

a link in a chain

a coordinate system that rotates

clockwise rotation

an undulating curve