  Exact analytic solutions for one-dimensional elastic lumped line under
affection of external force inclined to the axe of line is analyzed. It is
shown that in this case an inclined wave being described by implicit function
propagates along the line. The conclusions were extended both to unforced
vibrations in the line and to distributed-parameters line vibrations. Solution
in the form of implicit function is proved as a generalizing one for the wave
equation
