| 摘要 |
PURPOSE:To control construction securely and effectively by providing each measuring rod with a level indication mark at constant distance from the lower side and also providing a scale for reading respective level indication marks. CONSTITUTION:Many measuring rods 4, 4... are arranged on frames positioned above and below a frame rule 1 at intervals in a vertically movalbe state. Then, the respective measuring rods 4, 4... are provided with level indication makrs 9, 9... at constant distance from their lower sides and also equipped with scales 10, 10... for reading those level indication marks 9, 9.... In this case, as operation plate 7 is lowered after the leveling state of the frame rule 1, and then the respective level indication marks 9, 9... provided to the measuring rods 4, 4... are arrayed along the unevennes of a road surface on which the measuring rods 4, 4... abut, so the construction control is performed securely and effectively by seeing the level indication marks 9, 9.... |
