| 摘要 |
A hose water leveling instrument in which a thin hose is filled with liquid and has an end to which a fixable reference instrument is connected. Another end of this hose has connected to it a freely-movable reading instrument. The housing of the reference instrument has on its rear side, a mounting surface with adhesive characteristics. A contacting section next to this mounting surface has a measuring scale which is easily read from different directions. An automatically opening and closing venting valve prevents run out of this measuring liquid, and is located in the reference instrument which is permanently filled with measuring liquid. The venting valve is in the form of a plane-convex body located in a valve chamber. The body on its plane surface facing a valve chamber wall, has a lever which, in a horizontal position of the reference instrument forces a ball-shaped closure body against a valve seat of a venting aperture when the plane-convex body, due to the weight of the lever is pivoted about a fulcrum on the periphery of the body.
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