What is a typical characteristic of a bent blade described as 'bow'?

A bent blade described as 'bow' typically exhibits distortion from its original form. This means that instead of the blade being perfectly straight or maintaining its intended aerodynamic shape, it has curvature or deformation that affects its function. This distortion can result from various factors, such as impact, wear, or manufacturing defects, and often impacts the efficiency and performance of the blade.

In contrast, the other options describe characteristics that do not directly relate to the specific concept of 'bow' in a bent blade. A small rounded hollow might imply a different type of flaw, whereas a smooth repair refers to the quality of a fix rather than the original form of the blade. An elongation of the blade suggests a different type of physical alteration that is not synonymous with the bending described by 'bow.'