| 摘要 |
PROBLEM TO BE SOLVED: To provide a gradient gauge with which the gradient adjusting work piping can be carried out easily and quickly. SOLUTION: A gradient gauge 30 is constituted of a cylindrical main body 32 having a displaying section 31 at its center and a pair of supporting sections 33a and 33b which have such horizontal trapezoidal shapes that are extended obliquely upward and downward from the main body 32 and also have the same length as the main body 32 has. Cylindrical first leg sections 34a and 34b and second leg sections 35a and 35b which have the same length as the main body 32 has and are made of rubber are respectively provided at both end sections of the supporting sections 33a and 33b. On both sides of the main body 32, internal spaces 36 which are curved toward the main body 32 in circular-arcuate states are respectively formed between the first leg sections 34a and 34b and between the second leg sections 35a and 35b.
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