| 摘要 |
The invention is a method and device for measuring the slope of a surface. The device includes a frame, one or more clear tubes containing a liquid and a gas bubble, and an attachment facilitating attachment to a sloped surface. The attachment may be a removable strap or magnets. The tubes are fixed at angles greater than zero degrees and less than ninety degrees relative to the bottom surface of the frame and a visual indication of the angle of each tube is present on the device. The device is designed to be placed parallel to the slope of a sloped surface and the slope of the surface can then be increased or decreased such that the gas bubble will become centered within the tube when the angle of slope conforms to a desired standard.
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