| 摘要 |
An angle measuring apparatus (10) for determining the angular orientation of the external surface of an article (100) relative to a known reference plane wherein the apparatus (10) includes two separable housing members (15) (16) having indicia (20) (20') representative of angular orientations with regard to the horizontal and vertical planes respectively wherein the housing members (15) (16) slideably surround a stack (40) of slideable strips (41) bearing discrete markings (42); whereby the strips will conform to the surface of an article (100) such that the discrete markings (42) will produce a visual indication of the angular disposition of the article surface relative to a known reference plane; and wherein at least one of the housing members (15) is provided with a transparent sealed chamber (70) which is operatively associated with the indicia (20') for giving a visual indication of the angular orientation of the housing member (15).
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