cut-off

英文释义

n. That which cuts off or shortens, as a nearer passage or
road.
n. The valve gearing or mechanism by which steam is cut off
from entering the cylinder of a steam engine after a definite point in
a stroke, so as to allow the remainder of the stroke to be made by the
expansive force of the steam already let in. See Expansion gear, under
Expansion.
n. Any device for stopping or changing a current, as of grain
or water in a spout.