| 摘要 |
A structure leveling sytem comprises a plurality of portable members each including a base having a bottom and a transparent tube open at its having a bottom and a transparent tube open at its top and upstanding from the base and provided with graduations at intervals along its length. The graduations on all tubes correspond, whereby like graduations on the tubes denote identical distances above the bottoms of the bases. The system also comprises flexible tubing interconnecting the bottoms of the tubes with each other. Liquid, such as water, is introduced into the system through the top of one of the tubes and the structure to be leveled in manipulated until the liquid level in all tubes is at corresponding graduations, thus denoting that the bottoms of the bases are at a common elevation and hence that the structure is level.
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