| 摘要 |
Disclosed herein is a system for leveling relative to a basis surface. The system includes an object having a first side confronting the basis surface and a second side opposite of the first side, a rod positioned to extend beyond the first side of the object to space the object from the basis surface and beyond a second side of the object to provide access to the rod, and first and second couplers to couple the rod and the object. Each of the first and second couplers includes a respective threaded hole threadably engaged with the rod to a position in which respective surfaces of the first and second couplers are in contact with, and rotationally stationary with respect to, the first and second sides of the object, respectively, such that rotation of the rod translates into translational displacement of the first and second couplers and the object.
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