| 摘要 |
PURPOSE:To enable accurate measurement of micro inclination, by a method wherein the undersurface of a continuous member is abutted against the surface of an object to be measured, a rotary scale is turned on the pivot point and the graduation of the surface of sheet member is read with a leveler showing a horizontal position. CONSTITUTION:A contact plane of a continuous member 1 is abutted to the uppermost surface section of the circumferential surface portion of a pipe buried underground. Thereafter, a rotary scale 3 is turned by a desired angle on the pivot part and stopped when a leveler 4 mounted integral thereon 3 shows a horizontal position. Then, a reference line provided on the rotary scale 3 and a graduation 5 indicated on a sheet member arranged being piled at a position of back of the rotary scale 3 are read out from the surface of the see through rotary scale 3. Thus, the finest gradient can be measured accurately.
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