Let r denote the perpendicular distance of a point in a body moving helically from the axis. [Please select]
0
It is advised that in all cases the gear wheels should be cut helically. [Please select]
0
A spring was wound spirally--not helically--around the projecting end of the breaker pivot and the end of the spring hookt over the thin finger. [Please select]
0
Another remarkable feature in these early gears is the use of ratchet-shaped teeth, sometimes even twisted helically so that the gears resemble worms intermeshing on parallel axles. [Please select]
Do you have a better example in your mind? Please submit your sentence!