| 摘要 |
<p>A method of measuring the shape of a tube body, comprising the steps of allowing a pair of reference parts (20, 20) to abut on the inner peripheral surface (11) of the tube body (10) near both side end parts, rotating the tube body (10) in the fixed state of the positions of the reference parts (20, 20) so that the contact parts of the tube body (10) with the reference parts (20, 20) are circumferentially moved on the inner peripheral surface (11) of the tube body (10), and detecting the radial displacement amount of the outer peripheral surface (12) of the tube body (10) due to the rotation of the tube body (10) at least one of the positions 31, ..., 32 ... circumferentially fixed on the outside of the tube body (10).</p> |
