| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow easy and accurate measurement of a diameter and a sphericity of a ball which is inflated by injecting a gas. <P>SOLUTION: A ball measuring tool 1 for measuring a diameter and a sphericity of a ball which is inflated by injecting a gas is formed in a semi-circular arc shape which is a half of a circumference of a circle having the same diameter as the stipulated diameter of the ball and has ball contact parts 10a, 20a with which the outer peripheral surface of the ball is brought into contact. <P>COPYRIGHT: (C)2012,JPO&INPIT |
