wheel+about
131breast wheel — noun : a waterwheel onto which the water is led at about axle height and which acts partly by impulse and partly by the weight of the descending water in the buckets compare overshot wheel, undershot wheel * * * a waterwheel onto which the… …
132Leading wheel — The leading wheel or leading axle of a steam locomotive is an unpowered wheel or axle located in front of the driving wheels. The axle or axles of the leading wheels are normally located in a truck (or bogie ). Leading wheels are used to help the …
