| 摘要 |
A measuring device is provided for carpenters, roofers and other tradesmen. The device is made of relatively lightweight plastic and has a variety of uses. The elongated base is rectangular in cross-section and includes a scale for measuring distances along one side. Pivotally affixed to the base is a level which can be locked against a protractor (also affixed to the base) at any angle between zero and ninety degrees (0°-90°). Roof pitches, gradients and other angles can be determined or set in a simple, easy to learn manner.
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